A static extrusion forging mold structure for process nozzles.
By combining static extrusion forging technology with wear-resistant materials, the material cost and precision issues of process nozzles under high temperature and high pressure environments have been solved, achieving a highly efficient and economical forging method.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI XINLI INJECTOR R&D
- Filing Date
- 2025-06-03
- Publication Date
- 2026-05-26
AI Technical Summary
Existing process nozzles are used in high temperature, high pressure and corrosive environments. Traditional forging methods result in high material costs, low dimensional accuracy and difficulty in forming complex structures.
Using static extrusion forging technology, components such as upper and lower dies, inner punches, and pads are used to form forgings through static extrusion forging. Machining allowances are reserved and wear-resistant, high-hardness materials are overlaid, reducing the amount of raw materials used and improving dimensional accuracy.
It significantly reduces raw material costs, improves the dimensional accuracy of forgings, reduces the probability of surface cracks, and simplifies the processing technology.
Smart Images
Figure CN224273132U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal chemical technology, specifically to a static extrusion forging model structure for process nozzles. Background Technology
[0002] The process nozzles are installed at the top of the coal gasifier. Their function is to grind dry coal powder, coal-water slurry, or other organic solutions into a qualified coal slurry in a certain proportion, and then premix it with pure oxygen from the air separation unit before it enters the gasifier. Under certain temperature and pressure, a chemical reaction occurs to produce crude syngas, mainly composed of Co + H2. The crude syngas is then sent to the downstream purification unit for further processing. Figure 1 As shown, a process nozzle is generally composed of an external oxygen assembly, a coal slurry assembly, a central oxygen assembly, and other flow channels. Each component has an external interface, and the head is equipped with a corresponding nozzle, such as... Figure 2 As shown. The components are assembled, and the atomization size of the head is controlled before being connected using bolts.
[0003] The process nozzle head is located inside the gasifier furnace during use, and is subjected to high temperatures (1300℃), high pressures (4-10 MPa), and a highly corrosive environment. Therefore, special care must be taken during the manufacturing process of the process nozzle. Figure 2 The nozzle shown has higher requirements for its material. In addition to being a high-temperature alloy material with stronger high-temperature and corrosion resistance, the material's physical properties are also subject to higher requirements.
[0004] Take the external oxygen head of the nozzle as an example. Figure 3 As shown, both the front cover and the middle section of the external oxygen head are forged materials. Traditional forging methods employ free forging. To avoid cracks caused by repeated forging and high-temperature burning, and to address the issue of inconsistent dimensional accuracy in free forging, sufficient forging allowances must be left on each surface in the forging design, in addition to the precision machining dimensions. For the external oxygen head of the process nozzle, the forging allowance is generally 5-8mm. Furthermore, due to the limitations of free forging, complex structures are difficult to form and can only be machined into basic shapes. For example, the middle section of the external oxygen head mentioned above can only be machined into a simple shape. This process significantly increases material costs, ultimately turning a large amount of solid material into iron filings.
[0005] With increasingly fierce market competition, reducing product costs and improving market competitiveness have become key tasks for enterprise development. Through market research and by combining the latest static extrusion forging technology, the processing technology of forging raw materials for process nozzle head spare parts has been improved, providing a new processing method that significantly reduces raw material costs. Utility Model Content
[0006] The purpose of this invention is to provide a static extrusion forging mold structure for process nozzles and tips that significantly reduces raw material costs, facilitates processing, and achieves high dimensional accuracy.
[0007] To achieve the above objectives, this utility model employs the following technical solution:
[0008] A static extrusion forging mold structure for a process nozzle tip includes an upper mold, a lower mold, an inner punch shaft-connected to the upper mold, and a pad shaft-connected to the lower mold. The forged product is located between the upper mold and the lower mold. The shape and dimensions of the inner wall of the lower mold match the shape and dimensions of the outer wall of the forged product, and the shape and dimensions of the outer wall of the inner punch match the shape and dimensions of the inner wall of the forged product.
[0009] Furthermore, the forged product has a 2mm machining allowance on each machined surface.
[0010] Furthermore, the contact surfaces of the forged product with the upper die, lower die, inner punch, and pad are respectively overlaid with 5mm of wear-resistant, high-hardness material.
[0011] Furthermore, a bolt is provided at the bottom of the pad, which can be used as a punch to push out the forged product.
[0012] Compared with the prior art, this utility model has the following advantages:
[0013] This utility model discloses a static extrusion forging model structure for process nozzles and tips. It adopts static extrusion forging technology and uses a large press to statically extrude the workpiece. The forgings formed by this processing technology have high dimensional accuracy, and the probability of surface cracks caused by slow extrusion is greatly reduced. On this basis, the blank forging allowance of raw materials can be greatly reduced, saving raw materials compared with traditional processing methods. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of the nozzle in the existing technology process.
[0015] Figure 2 This is a schematic diagram of the nozzle structure of existing technology nozzles.
[0016] Figure 3 This is a forging diagram of the nozzle of the existing technology using a free forging method.
[0017] Figure 4 This is a forging drawing of the external oxygen nozzle of this utility model using a static extrusion method.
[0018] Figure 5 This is a schematic diagram of the forging model structure of the external oxygen nozzle of this utility model using a static extrusion method.
[0019] Figure 6 This is a schematic diagram of the structure of the forging mold of this utility model.
[0020] Figure 7 This is a schematic diagram of the structure of the lower mold of the forging model of this utility model.
[0021] Figure 8 This is a schematic diagram of the forging mold pad block of this utility model.
[0022] Figure 9 This is a schematic diagram of the structure of the outer punch of the forging mold of this utility model.
[0023] Figure 10 This is a schematic diagram of the structure of the inner punch of the forging mold of this utility model.
[0024] Figure 11 This is a schematic diagram of the forging process of this utility model (I).
[0025] Figure 12 This is a schematic diagram (II) of the forging process of this utility model.
[0026] Figure 13 This is a schematic diagram (III) of the forging process of this utility model.
[0027] Reference numerals: 1. Upper die; 2. Lower die; 3. Inner punch; 4. Spacer block; 5. Outer punch; 6. Forged product; 7. Bolt; 8. Weld overlay. Detailed Implementation
[0028] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.
[0029] Example 1
[0030] Embodiment 1 of this utility model uses an external oxygen nozzle as the forging product, such as... Figure 4 , 5 As shown, the forging includes an upper mold 1, a lower mold 2, an inner punch 3 axially connected to the upper mold 1, and a pad block 4 axially connected to the lower mold 2. The forged product 6 is located between the upper mold 1 and the lower mold 2. The shape and size of the inner wall of the lower mold 2 match the shape and size of the outer wall of the forged product 6, and the shape and size of the outer wall of the inner punch 3 match the shape and size of the inner wall of the forged product 6.
[0031] The final forged product 6 has a 2mm machining allowance on each machined surface.
[0032] like Figure 6 , 7 As shown in Figures 8, 9, and 10, the contact surfaces of the forged product 6 with the upper mold 1, lower mold 2, inner punch 3, and pad block 4 are respectively provided with 5mm weld overlay 8, and the weld overlay 8 is made of wear-resistant and high-hardness material.
[0033] Furthermore, to ensure proper fit between the molds, a certain clearance is reserved in the design. Specifically, the inner diameter D3 of the lower mold 2 is 1mm larger than the outer diameter D2 of the step of the upper mold 1; the inner diameter D4 of the bottom hole of the lower mold 2 is 1mm larger than the outer diameter D5 of the pad block 4; the inner diameter D3 of the lower mold 2 is 2mm larger than the outer diameter D6 of the outer punch 5; and the inner diameter D1 of the upper mold 1 is 1mm larger than the outer diameter D7 of the inner punch 3.
[0034] In the actual forging process, such as Figure 11 , 12 As shown, the blank is forged for the first time using the external punch 5, as follows: Figure 13 As shown, the blank is then extruded a second time using the inner punch 3.
[0035] Preferably, a bolt 7 is provided at the bottom of the pad block 4. The bolt 7 can be used as a punch to push out the forged workpiece, so as to avoid the forged workpiece 6 after extrusion from being stuck in the mold.
[0036] The forging technique described in Example 1 is also applicable to the processing of different nozzle forgings for various other process nozzles.
[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A static extrusion forging mold structure for process nozzles, characterized in that: It includes an upper mold, a lower mold, an inner punch shafted to the upper mold, and a pad shafted to the lower mold. The forged product is located between the upper mold and the lower mold. The shape and size of the inner wall of the lower mold match the shape and size of the outer wall of the forged product, and the shape and size of the outer wall of the inner punch match the shape and size of the inner wall of the forged product.
2. The static extrusion forging mold structure for a process nozzle head according to claim 1, characterized in that: The forged product has a 2mm machining allowance on each machined surface.
3. A static extrusion forging mold structure for a process nozzle head according to claim 1 or 2, characterized in that: The contact surfaces of the forged product with the upper die, lower die, inner punch, and pad are each welded with a 5mm layer of wear-resistant, high-hardness material.
4. The static extrusion forging mold structure for a process nozzle head according to claim 3, characterized in that: The inner bottom of the pad has a bolt, which can be used as a punch to push out the forged product.