Controllable pre-oxidation device for nodular cast iron surface

Abstract

The utility model relates to the technical field of metal surface treatment, and provides a nodular cast iron surface controllable pre-oxidation device which comprises a workbench, a heating cavity, an oxidation cavity and a clamping mechanism, the heating cavity, the oxidation cavity and the clamping mechanism are installed on the workbench, and the clamping mechanism is used for transferring nodular cast iron in the heating cavity to the oxidation cavity; the oxidation chamber is provided with a through hole, the oxidation chamber is provided with a baffle assembly used for closing the through hole, the baffle assembly comprises a fixing ring and a plurality of fan-shaped plates, each fan-shaped plate is hinged to the fixing ring, and the fixing ring is fixed to the inner wall of the through hole; a torsional spring is installed at the hinged position of each sector plate and the fixing ring, and the torsional springs enable all the sector plates to be folded together in the normal state. According to the controllable pre-oxidation device for the nodular cast iron surface, the oxidation cavity can be closed in time.

Description

Technical Field

[0001] This application relates to the field of metal surface treatment technology, and in particular to a controllable pre-oxidation device for ductile iron surfaces. Background Technology

[0002] Ductile iron is a material in which carbon within the cast iron is spheroidized and graphitized through a spheroidizing treatment. This treatment effectively improves the mechanical properties, plasticity, and toughness of the cast iron, making its overall performance close to that of steel, thus making it a hard and durable casting material.

[0003] When performing pre-oxidation treatment on ductile iron, the ductile iron workpiece is first heated to a predetermined temperature, and then the heated workpiece is immersed in an oxidation chamber containing an oxidant for oxidation. After the oxidation reaction is completed, the workpiece is removed from the solution and cooled. Then, the workpiece is washed with distilled water to remove residual oxidant and other impurities.

[0004] If the oxidant is exposed to the outside air for a long time, it may absorb moisture from the air and deteriorate, producing harmful byproducts or reducing its oxidizing capacity; therefore, a pre-oxidation device that can close the oxidation chamber in a timely manner is needed. Utility Model Content

[0005] In order to close the oxidation chamber in a timely manner, this application provides a controllable pre-oxidation device for the surface of ductile iron.

[0006] The technical solution provided in this application for a controllable pre-oxidation device for ductile iron surfaces is as follows:

[0007] A controllable pre-oxidation device for ductile iron surfaces includes a worktable, a heating chamber mounted on the worktable, an oxidation chamber, and a clamping mechanism. The clamping mechanism is used to transfer ductile iron from the heating chamber to the oxidation chamber. The oxidation chamber has a through hole and is equipped with a baffle assembly for closing the through hole. The baffle assembly includes a fixing ring and multiple sector plates, each sector plate being hinged to the fixing ring, which is fixed to the inner wall of the fixing ring. A torsion spring is installed at the hinge point between each sector plate and the fixing ring, and the torsion spring normally causes all sector plates to retract towards each other.

[0008] By adopting the above technical solution, and by setting up a baffle assembly, when multiple sector plates retract with each other under the action of torsion springs, the through holes of the oxidation chamber can be effectively sealed, ensuring the airtightness of the oxidation chamber and preventing the oxidant from failing due to prolonged exposure to the outside environment. When ductile iron needs to be placed into the oxidation chamber, the clamping assembly will apply force to the sector plates to make them rotate along their hinges, so that the ductile iron can smoothly enter the oxidation chamber. No additional drive device is needed to control the opening and closing of the sector plates, the structure is simple and practical, and the complexity and cost of the device are reduced.

[0009] Optionally, adjacent sector plates are provided with sealing gaskets.

[0010] By adopting the above technical solution, the sealing gasket can fill the tiny gaps between adjacent sector plates, further increasing the sealing performance of the through hole.

[0011] Optionally, the clamping mechanism includes a gantry mounted on the worktable, a linear module mounted on the gantry, a lifting cylinder, and a clamping assembly. The lifting cylinder is mounted on the slider of the linear module. The clamping assembly includes a mounting block, an adjusting cylinder, and two clamping plates. The mounting block is mounted on the movable piston of the lifting cylinder.

[0012] The mounting block has two sliding grooves, and the two clamping plates are slidably installed in the two sliding grooves respectively; the mounting block has an adjustment groove, and an adjustment main rod is slidably installed in the adjustment groove. An adjustment support rod is provided between the adjustment main rod and the clamping plate, and the two ends of the adjustment support rod are respectively hinged to the adjustment main rod and the clamping plate; the adjustment cylinder is installed on the mounting block and connected to the adjustment main rod.

[0013] By employing the above-described technical solution, the gantry frame, linear module, lifting cylinder, and clamping assembly work together to achieve precise movement and positioning of ductile iron in three-dimensional space. The linear module provides precise displacement in the horizontal direction, while the lifting cylinder controls the vertical height, ensuring that the ductile iron accurately reaches the designated positions in the heating and oxidation chambers during transfer, thus improving the accuracy and consistency of the pre-oxidation treatment.

[0014] The adjusting cylinder can precisely control the movement of the adjusting rod, which in turn drives the clamping plate to open and close through the adjusting support rod, thus achieving the clamping of ductile iron of different sizes and shapes, and has strong adaptability and flexibility.

[0015] Optionally, both of the clamping plates are coated with a ceramic coating.

[0016] By adopting the above technical solution, the ceramic coating has good high temperature resistance and can maintain stable performance in high temperature environments, without deformation or detachment due to excessive temperature.

[0017] Optionally, the mounting block is fitted with a sleeve, and both clamps are fitted inside the sleeve, with the end of the sleeve furthest from the mounting block being lower than the end of the clamps furthest from the mounting block.

[0018] By adopting the above technical solution, if ductile iron directly contacts the sector plate during the transfer process, scratches, pits, and other damage may occur on the surface due to collisions and friction, affecting its surface quality and subsequent performance. The sleeve first contacts the sector plate, acting as a buffer to prevent direct contact between the ductile iron and the sector plate, thus protecting the surface integrity of the ductile iron and ensuring that its quality is not affected before and after the pre-oxidation treatment.

[0019] Optionally, the outer diameter of the sleeve is adapted to the inner diameter of the fixing ring.

[0020] By adopting the above technical solution, when the outer diameter of the sleeve is matched with the inner wall of the through hole, a relatively tight fit can be formed between the two, reducing or even eliminating gaps; ensuring that the oxidation process is carried out in a relatively closed environment.

[0021] Optionally, a first heating wire is provided in the oxidation chamber.

[0022] By adopting the above technical solution, since temperature is one of the key factors affecting the oxidation reaction rate, the pre-controllable temperature provided by the first heating wire can directly regulate the oxidation reaction process of ductile iron, meeting the specific requirements of different products for oxidation performance.

[0023] Optionally, the outer wall of the heating chamber is coated with a heat-insulating coating.

[0024] By adopting the above technical solution, the heating chamber can be kept warm, preventing hot air leakage.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. By setting up a baffle assembly, when multiple sector plates retract with each other under the action of torsion springs, they can effectively seal the through holes of the oxidation chamber, ensure the airtightness of the oxidation chamber, and prevent the oxidant from being exposed to the outside for a long time and failing.

[0027] 2. By setting a sleeve, the sleeve first contacts the sector plate, which can play a buffering role and avoid direct contact between the ductile iron and the sector plate, thereby protecting the surface integrity of the ductile iron and ensuring that its quality is not affected before and after the pre-oxidation treatment. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of this embodiment;

[0029] Figure 2 This is a schematic diagram of the clamping assembly in this embodiment;

[0030] Figure 3 yes Figure 2 A magnified view of a portion at point a;

[0031] Figure 4 This is a structural schematic diagram of the baffle assembly.

[0032] Explanation of reference numerals in the attached drawings: 1. Workbench; 2. Heating chamber; 21. Opening; 22. Heating platform; 23. Heat insulation coating; 3. Oxidation chamber; 31. Through hole; 4. Clamping mechanism; 41. Gantry frame; 42. Linear module; 43. Lifting cylinder; 44. Clamping assembly; 45. Mounting block; 451. Slide groove; 452. Adjustment groove; 46. Adjustment cylinder; 47. Clamping plate; 471. Ceramic coating; 48. Adjustment main rod; 49. Adjustment support rod; 5. Baffle assembly; 51. Fixing ring; 52. Sector plate; 53. Torsion spring; 54. Mounting plate; 55. Rotating shaft; 56. Sealing gasket; 6. Sleeve. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0034] This application discloses a controllable pre-oxidation device for the surface of ductile iron.

[0035] Reference Figure 1 A controllable pre-oxidation device for ductile iron surface includes a worktable 1 and a heating chamber 2, an oxidation chamber 3, a clamping mechanism 4, and a baffle assembly 5 installed on the worktable 1. The heating chamber 2 is used to heat the ductile iron to the required temperature; the oxidation chamber 3 contains an oxidizing agent liquid for oxidizing the heated ductile iron; and the clamping mechanism 4 is used to transfer the ductile iron from the heating chamber 2 to the oxidation chamber 3.

[0036] The clamping mechanism 4 includes a gantry 41, a linear module 42, a lifting cylinder 43, and a clamping assembly 44. The gantry 41 is mounted on the worktable 1, and the linear module 42 is mounted on the gantry 41 to provide precise displacement in the horizontal direction. The lifting cylinder 43 is mounted on the linear module 42 to control the height in the vertical direction. The movable piston of the clamping mechanism 4 mounted on the lifting cylinder 43 is used to clamp ductile iron.

[0037] Reference Figure 2 The clamping mechanism 4 includes a mounting block 45, an adjusting cylinder 46, and two clamping plates 47. The mounting block 45 is mounted on the movable plug of the lifting cylinder 43. Two sliding grooves 451 are opened on the side of the mounting block 45 away from the lifting cylinder 43. The two clamping plates 47 are slidably mounted in the two sliding grooves 451 respectively. The two clamping plates 47 are used to clamp the ductile iron. The surface of the clamping plates 47 is coated with a ceramic coating 471. The ceramic coating 471 has the characteristics of high hardness and high wear resistance, which can effectively reduce the wear between the clamping plates 47 and the ductile iron and extend the service life of the clamping plates 47.

[0038] Simultaneously refer to Figure 3The mounting block 45 has an adjustment groove 452, the extension direction of which is perpendicular to the extension direction of the slide groove 451; an adjustment main rod 48 is slidably installed in the adjustment groove 452, and two adjustment support rods 49 are rotatably installed on the adjustment main rod 48. The ends of the two adjustment support rods 49 away from the adjustment main rod 48 are respectively hinged to two clamping plates 47; a movable groove communicating with the adjustment groove 452 is opened on the side wall of the mounting block 45; an adjustment cylinder 46 is installed on the side wall of the mounting block 45, and the movable plug of the adjustment cylinder 46 passes through the movable groove and is connected to the adjustment main rod 48.

[0039] The mounting block 45 is fitted with a sleeve 6, and the two clamping plates 47 and the adjusting main rod 48 are all located inside the sleeve 6. The end of the sleeve 6 away from the mounting block 45 is lower than the end of the clamping plate 47 away from the mounting block 45.

[0040] Reference Figure 1 The heating chamber 2 has an opening 21 for the sleeve 6 to pass through; a second heating wire and a heating platform 22 are installed in the heating chamber 2. The second heating wire is used to heat the heating chamber 2. The graphite cast iron is placed on the heating platform 22 for heating. The outer diameter of the heating platform 22 is smaller than the inner diameter of the sleeve 6 so that the two clamping plates 47 can clamp the graphite cast iron on the heating platform 22.

[0041] The outer wall of the heating chamber 2 is coated with a heat-insulating coating 23, which effectively reduces heat transfer from the heating chamber 2 to the surrounding environment and reduces heat loss. This means that the heat inside the heating chamber 2 can be used more effectively for the heat treatment of ductile iron, improving heating efficiency and reducing energy waste.

[0042] The oxidation chamber 3 has a through hole 31 for placing ferrographite cast iron into the oxidation chamber 3. In this embodiment, two sets of baffle assemblies 5 are provided, with the two baffle assemblies 5 respectively installed in the oxidation chamber 3 and the heating chamber 2, for closing the through hole 31 and the opening 21. The baffle assembly 5 includes a fixing ring 51, multiple sector plates 52, and multiple torsion springs 53.

[0043] Reference Figure 4 The fixing ring 51 is equipped with two mounting plates 54. The sector plate 52 is rotatably mounted between the two mounting plates 54 via the rotating shaft 55. The torsion spring 53 is sleeved on the outer wall of the rotating shaft 55, and the two ends of the torsion spring 53 are respectively connected to the sector plate 52 and the mounting plate 54. The elastic force of the torsion spring 53 normally causes all the sector plates 52 to retract into each other.

[0044] In this embodiment, a sealing gasket 56 is provided on the outer wall of the sector plate 52. The sealing gasket 56 can fill the tiny gap between adjacent sector plates 52, effectively blocking the gas leakage channel that may exist, thereby significantly enhancing the sealing effect of the baffle assembly 5 on the through hole 31 of the oxidation chamber 3.

[0045] The implementation principle of a controllable pre-oxidation device for ductile iron surface according to an embodiment of this application is as follows:

[0046] When multiple sector plates 52 retract towards each other under the action of torsion spring 53, they can effectively seal the through hole 31 of the oxidation chamber 3, ensuring the airtightness of the oxidation chamber 3 and preventing the oxidant from failing due to prolonged exposure to the outside environment. When ductile iron needs to be placed into the oxidation chamber 3, the clamping assembly 44 applies force to the sector plates 52 to make them rotate along their hinges, allowing the ductile iron to smoothly enter the oxidation chamber 3. No additional drive device is required to control the opening and closing of the sector plates 52, making the structure simple and practical, reducing the complexity and cost of the device.

[0047] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A controllable pre-oxidation device for ductile iron surface, characterized in that: The device includes a workbench (1), a heating chamber (2) installed on the workbench (1), an oxidation chamber (3), and a clamping mechanism (4). The clamping mechanism (4) is used to transfer ductile iron in the heating chamber (2) to the oxidation chamber (3). The oxidation chamber (3) has a through hole (31). The oxidation chamber (3) is provided with a baffle assembly (5) for closing the through hole (31). The baffle assembly (5) includes a fixing ring (51) and multiple sector plates (52). Each sector plate (52) is hinged to the fixing ring (51). The fixing ring (51) is fixed to the inner wall of the drain pipe. Each sector plate (52) is fitted with a torsion spring (53) at the hinge point between it and the fixing ring (51). The torsion spring (53) normally causes all the sector plates (52) to retract into each other.

2. The controllable pre-oxidation device for ductile iron surface according to claim 1, characterized in that: The adjacent sector plate (52) is provided with a sealing gasket (56).

3. The controllable pre-oxidation device for ductile iron surface according to claim 1, characterized in that: The clamping mechanism (4) includes a gantry (41) mounted on the workbench (1), a linear module (42) mounted on the gantry (41), a lifting cylinder (43), and a clamping assembly (44). The lifting cylinder (43) is mounted on the slider of the linear module (42). The clamping assembly (44) includes a mounting block (45), an adjusting cylinder (46), and two clamping plates (47). The mounting block (45) is mounted on the movable plug of the lifting cylinder (43). The mounting block (45) has two sliding grooves (451), and the two clamping plates (47) are slidably installed in the two sliding grooves (451); the mounting block (45) has an adjustment groove (452), and an adjustment main rod (48) is slidably installed in the adjustment groove (452). An adjustment support rod (49) is provided between the adjustment main rod (48) and the clamping plate (47), and the two ends of the adjustment support rod (49) are respectively hinged to the adjustment main rod (48) and the clamping plate; the adjustment cylinder (46) is installed on the mounting block (45) and connected to the adjustment main rod (48).

4. The controllable pre-oxidation device for ductile iron surface according to claim 3, characterized in that: Both of the clamps (47) are coated with a ceramic coating (471).

5. The controllable pre-oxidation device for ductile iron surface according to claim 3, characterized in that: The mounting block (45) is fitted with a sleeve (6), and both clamps (47) are fitted inside the sleeve (6). The end of the sleeve (6) away from the mounting block (45) is lower than the end of the clamps (47) away from the mounting block (45).

6. The controllable pre-oxidation device for ductile iron surface according to claim 5, characterized in that: The outer diameter of the sleeve (6) is adapted to the inner wall of the fixing ring (51).

7. The controllable pre-oxidation device for ductile iron surface according to claim 1, characterized in that: The oxidation chamber (3) is equipped with a first heating wire.

8. The controllable pre-oxidation device for ductile iron surface according to claim 1, characterized in that: The outer wall of the heating chamber (2) is coated with a heat-insulating coating (23).

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