A device for air cooling of a forged product by lateral blowing

Abstract

The utility model relates to the field of high -efficient high -quality heat treatment production of metal forgings, concretely relates to a kind of for forgings lateral air blowing air cooling device.The device includes: the lateral air blowing air cooling device includes fan frame part, fan part, support drag forging carrier part;Fan frame part includes carrier support, crossbeam, clamping groove;Carrier support is the three-dimensional openwork frame structure with backplate, backplate is equipped with n rows of clamping groove for cooperation with the rear end of tunnel fan outer cylinder, corresponding one root crossbeam is set in each row of clamping groove lower front, and tunnel fan outer cylinder is dragged by crossbeam front end, so that tunnel fan air outlet and support drag forging carrier part form certain angle;Fan part includes multiple fans, for air cooling forging placed on support carrier part;Support carrier part is used to support forging, and assist forging cooling.

Description

Technical Field

[0001] This utility model relates to the field of high-efficiency and high-quality heat treatment production of metal forgings, and specifically to a side-blowing air cooling device for forgings. Background Technology

[0002] Air cooling is a common cooling method in the heat treatment of forgings. The effectiveness of air cooling plays a decisive role in the microstructure and properties of forgings. Its cooling capacity lies between that of static air cooling and liquid medium cooling under the same conditions, simultaneously meeting the requirements of some materials for high cooling rates and low residual stress. Currently, many forgings produced by our company require air cooling during heat treatment, such as titanium alloys like TC11, TC18, and TC21, and high-temperature alloys like GH99, GH536, and GH3230. Previously, air cooling of forgings involved transferring them to the ground in the cooling area and placing a fan on one side for blowing air. This method often resulted in uneven cooling, with the forging exhibiting uneven distribution, such as a sun-facing and shaded side. Significant differences in microstructure and properties were observed between the ground-facing and air-facing sides, and between the fan-facing and leeward sides. Therefore, it is necessary to improve the air cooling system. Furthermore, considering the limited layout and area of ​​the existing factory, the cooling operation needs to be simplified, and the cooling system should be rationally designed. Utility Model Content

[0003] The purpose of this invention is to design a side-blowing air-cooling device for forging cooling in order to improve the cooling effect and uniformity of forgings, simplify the forging cooling operation, reduce manual labor intensity, and improve production efficiency.

[0004] Technical solution: A side-blowing air-cooling device for forgings is provided, comprising: a fan frame part, a fan part, and a forging support carrier part; The fan frame includes a carrier support, a crossbeam, and a slot; The carrier support is a three-dimensional hollow frame structure with a back plate. The back plate has n rows of slots for cooperating with the rear end of the tunnel fan outer cylinder. A corresponding crossbeam is set below the front of each row of slots. The crossbeam supports the front end of the tunnel fan outer cylinder, so that the air outlet of the tunnel fan and the carrier part supporting the forging form a certain angle. The fan section includes a multi-stage fan for cooling the forgings placed on the load-bearing carrier section; the load-bearing carrier section is used to support the forgings and assist in cooling them.

[0005] Furthermore, the fan frame is constructed by welding together 40 square steel and 2mm thick steel plates, and the fan section includes multiple rows of tunnel fans; the installation angle of the tunnel fans is 30° to 60°.

[0006] Furthermore, the bottom height of the fan bracket is 200-250mm.

[0007] Furthermore, the distance between the fan frame and the support forging carrier is 1000-1500mm.

[0008] Furthermore, the hollowed-out volume of the support forging carrier part shall not be less than 70%, the height shall be 200-250mm, not less than the bottom height of the fan frame, the width shall not exceed the width of the fan frame, and the length shall not exceed 2500mm.

[0009] Furthermore, the fan section is arranged in two layers, with six tunnel fans on each layer. The distance between the tunnel fans is 20-50mm, and the distance between the upper and lower layers is 30-60mm.

[0010] Furthermore, the feature is that the longer the support carrier for the forging, the smaller the angle of the tunnel fan.

[0011] Furthermore, the support carrier for the forging can be integrated or modular depending on the size of the forging and the cooling zone, with lifting lugs around the perimeter for easy transfer and hoisting.

[0012] The beneficial effects are as follows: In the initial post-heat cooling process, forgings were arbitrarily placed on the ground, resulting in differences in microstructure and properties between the ground-facing and air-facing surfaces, leading to poor uniformity. Furthermore, the fans and forgings being on the same ground created differences between the windward and leeward sides, further contributing to poor uniformity. Additionally, the lack of clear boundary markings in the cooling zone and the unclear effective cooling range of the fans often resulted in forgings exceeding the effective cooling range during daily production, leading to insufficient cooling rates and non-compliance with microstructure and properties. By designing and using a side-blowing air-cooling device, forgings are placed on a support frame during cooling. During cooling, the cooling medium is evenly distributed across the upper and lower surfaces of the forging through a perforated frame. This avoids uneven cooling on both sides, preventing uneven microstructure and properties caused by uneven cooling. Moreover, the support frame is precisely sized and positioned according to the fan's cooling range, ensuring that all forgings on the support frame are within the effective air-cooling area. Raising the air-cooling frame by 200-250mm and fixing the fan at an angle of 30°-60° helps the airflow cover all surfaces of the forging, improves the uniformity of cooling, and enhances the stability and consistency of forging production.

[0013] This side-blowing air-cooling device features a clever design, is simple to use, easy to install, and convenient to operate. It is less restricted by the area of ​​the cooling zone and the factory layout, thus improving efficiency and saving costs. Furthermore, this side-blowing air-cooling device is inexpensive to manufacture and easy to implement. Attached Figure Description

[0014] Figure 1 This is a front view of a side-blowing air-cooling device; Figure 2 This is a side view of a side-blowing air-cooling device; Figure 3 This is a top view of a side-blowing air-cooling device; Figure 4 This is a schematic diagram of the cooling process for forgings. Detailed Implementation

[0015] This side-blowing air-cooling device has a three-dimensional L-shaped structure, such as... Figure 1-4 As shown, the side-blowing air-cooling device includes a fan frame part 1, a fan part 2, and a forging support carrier part 3; The fan frame part 1 includes a carrier support 11, a crossbeam 12, and a slot 13; The fan frame is constructed by welding together 40mm square steel and 2mm thick steel plate. The crossbeam (12) is located at the front end of the fan. The slot (14) is cut out in the back plate according to the size of the fan and works with the crossbeam (12) to support and fix a tunnel fan at an angle of 30° to 60°. The bottom height of the fan bracket is 200-250mm.

[0016] The distance between the fan frame and the support forging carrier is 1000-1500mm.

[0017] The support for the forging carrier is a three-dimensional hollow structure with a hollow volume of not less than 70%, a height of 200-250mm, not less than the bottom height of the fan frame (1), a width not exceeding the width of the fan frame, and a length not exceeding 2500mm.

[0018] The tunnel ventilation system is arranged in two layers, with six tunnel ventilation fans on each layer. The distance between the tunnel ventilation fans is 20-50mm, and the distance between the upper and lower layers is 30-60mm.

[0019] The longer the carrier supporting the forging (i.e., the larger the area that needs to be covered by air cooling), the smaller the angle of the tunnel ventilation fan.

[0020] The support carrier for forgings can be integrated or modular depending on the size of the forgings and the cooling zone, with lifting lugs around the perimeter for easy transfer and hoisting.

[0021] The overall diagram of the side-blowing air-cooling device is as follows: Figure 1 As shown, it is integrally welded from square steel, steel plates, and tunnel ventilation fan. Figure 1 As shown, the carrier portion supporting the forging is as follows: Figure 3 As shown, the air-cooled frame is made by casting in one piece. Its dimensions are 5000mm×1600mm×1000mm, and the dimensions of the carrier supporting the forging are 2000mm×1300mm×220mm.

[0022] The overall dimensions of the side-blowing air-cooling device are 5000mm×1600mm×4500mm.

[0023] During the air cooling process, forgings exhibit uneven cooling due to various factors. To achieve uniform cooling rates across all surfaces of the forging, improve production efficiency, and enhance the uniformity of the forging's microstructure and properties, the specific steps are as follows: Step 1: Hoist and transfer the carrier supporting the forging to 1000-1500mm in front of the air-cooling frame; Step 2: Turn on the tunnel ventilation fan (the number of fans to turn on can be determined based on the number and structure of the forgings). Step 3: Quickly transfer the forging to the support carrier.

[0024] Example 1 A certain annular GH99 forging, made of GH99, has dimensions of Φ370mm × Φ318mm × 52mm. GH99 forgings are sensitive to cooling rate during solution cooling. A fast cooling rate results in soft forgings with low strength, while a slow cooling rate results in hardness and high strength. In the early stages of production, uneven cooling rates during air cooling led to inconsistent hardness across different parts of the forging. This inconsistency further resulted in uneven stress distribution, causing severe deformation during subsequent machining. At this point, the forging allowance was small, making correction time-consuming, labor-intensive, and extremely difficult with a low success rate. This resulted in significant cost waste and production delays. The side-blowing air cooling device is used for heat treatment cooling according to the described method: Step 1: Hoist and transfer the carrier supporting the forging to 1000mm in front of the air-cooling frame; Step 2: Turn on the tunnel ventilation fan (the number of fans to turn on can be determined based on the number and structure of the forgings). Step 3: Quickly transfer the forging to the support carrier.

[0025] Hardness tests were performed on three points evenly distributed on the two end faces of the heat-treated forging. The hardness difference of the forging (HB) was within 20, which strongly demonstrates that the modified side-blowing cooling device is very effective.

Claims

1. A side-blowing air-cooling device for forgings, characterized in that, include: The side-blowing air-cooling device includes a fan frame (1), a fan (2), and a forging support carrier (3). The fan frame part (1) includes a carrier support (11), a crossbeam (12), and a slot (13); The carrier support (11) is a three-dimensional hollow frame structure with a back plate. The back plate has n rows of slots (13) for cooperating with the rear end of the tunnel fan outer cylinder. A corresponding crossbeam (12) is set below the front of each row of slots (13). The crossbeam (12) supports the front end of the tunnel fan outer cylinder, so that the air outlet of the tunnel fan and the carrier part (3) supporting the forging form a certain angle. The fan section includes multiple rows of fans used to exhaust air and cool the forgings placed on the load-bearing carrier section; the load-bearing carrier section is used to support the forgings and assist in cooling them.

2. The side-blowing air-cooling device according to claim 1, characterized in that, The fan frame is constructed by welding together 40 square steel and 2mm thick steel plate. The fan section includes multiple rows of tunnel fans. The installation angle of the tunnel fans is 30° to 60°.

3. The side-blowing air-cooling device according to claim 2, characterized in that, The bottom height of the fan bracket is 200-250mm.

4. The side-blowing air-cooling device according to claim 1, characterized in that, The distance between the fan frame part (1) and the support forging carrier part (3) is 1000-1500mm.

5. The side-blowing air-cooling device according to claim 1, characterized in that, The hollow volume of the support for the forging carrier part shall not be less than 70%, the height shall be 200-250mm, not less than the bottom height of the fan frame part (1), the width shall not exceed the width of the fan frame part, and the length shall not exceed 2500mm.

6. The side-blowing air-cooling device according to claim 1, characterized in that, The fan section is arranged in two layers, with 6 tunnel fans on each layer. The distance between tunnel fans is 20-50mm, and the distance between the upper and lower layers is 30-60mm.

7. The side-blowing air-cooling device according to claim 1, characterized in that, The longer the carrier supporting the forging, the smaller the angle of the tunnel ventilation fan.

8. The side-blowing air-cooling device according to claim 1, characterized in that, The support carrier for the forging is either an integral or separate assembly depending on the size of the forging and the cooling zone, with lifting lugs around the perimeter for easy transfer and hoisting.

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