Forming device for thick-wall right-cone composite structure part

Abstract

The utility model relates to a thick-wall straight cone composite structure part forming device which comprises an inner spinning roller, an outer spinning roller, a bearing, a nut, a spinning roller shaft and a base, and the inner spinning roller and the outer spinning roller are fixedly connected with the base through the spinning roller shaft and the nut respectively. The two ends of the inner spinning roller and the outer spinning roller are matched through bearings and nuts respectively, and free rotating motion is achieved. The method specifically comprises the steps that a gap between an inner spinning roller and an outer spinning roller is determined according to the wall thickness size of a spinning blank; before spinning, the deformation area of the part is heated to the initial forging temperature in an induction heating mode, and the spinning roller device is fed to operate in the initial machining state of the part; the spinning machining and forming device is driven by a swing arm of a spinning machine to rotate, meanwhile, the shaping wheel needs to reversely rotate together with the swing arm, the part is subjected to plastic deformation, the angle is gradually changed, the needed angle size is achieved, and forming of the straight cone composite structure part is achieved. The spinning device is high in spinning yield and high in machining efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to a forming device for thick-walled straight-cone composite structure parts. Background Technology

[0002] Straight-conical composite metal parts have wide applications in industries such as petroleum, chemical, aviation, and aerospace, including pipe joints, hydraulic vessel joints, conical vessel heads, missile casing transition sections, and nozzle diffuser sections. Their shape is primarily a composite structure of straight and conical sections, but more complex structures with multiple straight and conical sections are also possible. The parts are mainly made of steel and aluminum tubing, but titanium tubing can also be used.

[0003] Currently, there is no overall forming solution for the processing of thick-walled straight-conical composite structural parts. The main process used is sheet metal and welding technology, which involves rolling and welding the conical section into shape and then welding it to the straight section. However, this processing method results in a long product processing cycle due to the presence of welds, and the welds also pose significant quality risks.

[0004] The existing technology for processing straight-conical composite structural parts mainly involves rolling and welding the conical section, and then welding the straight and conical sections together. This processing technology has three main drawbacks. First, the rolling and welding method results in an excessively long processing cycle, involving material preparation, bending, and multiple welding and heat treatment steps. Second, the presence of multiple longitudinal and circumferential welds affects product performance and increases the risk of subsequent quality problems. Finally, the presence of welded structures limits the product's subsequent plastic processing capabilities; rolled and welded products are unsuitable for subsequent plastic forming of parts. Summary of the Invention

[0005] Based on the above problems, this utility model proposes a forming device and method for thick-walled straight-cone composite structure parts, so as to solve the problems of efficient and high-quality forming of existing straight-cone composite structure parts, and realize the integrated spinning forming of various thick-walled straight-cone composite structure parts.

[0006] To solve the above-mentioned technical problems, one of the objectives of this utility model is to provide a forming device for thick-walled straight cone composite structure parts, including: an inner rotating wheel 2, an outer rotating wheel 3, a bearing 6, a nut 7, an inner rotating wheel shaft 4, an outer rotating wheel shaft 5, and a base 1.

[0007] The inner rotating wheel 2 is fixedly connected to the base 1 via the inner rotating wheel shaft 4 and the nut 7; the outer rotating wheel 3 is fixedly connected to the base 1 via the outer rotating wheel shaft 5 and the nut 7; the inner rotating wheel 2 and the outer rotating wheel 3 are respectively connected by bearings 6 and nuts 7 at both ends to achieve free rotational movement; the base 1 is installed on the spinning machine.

[0008] Furthermore, the base 1 is mounted on the rotating shaft of a swing arm spinning machine with rotary feed control function.

[0009] Furthermore, the inner rotating wheel 2 and the outer rotating wheel 3 are made of heat-resistant steel.

[0010] Furthermore, the inner and outer rotating wheels are machined using hot work die steels such as 5CrMnMo, 4Cr5MoSiV, and 3Cr3Mo3W2V.

[0011] Furthermore, the inner rotating wheel shaft 4 and the outer rotating wheel shaft 5 are made of medium carbon alloy steel such as 42CrMo or 30CrMnSiA.

[0012] Furthermore, the base 1 is machined from medium carbon steel, medium carbon alloy steel forgings or castings.

[0013] Based on the same inventive concept, this utility model also provides a method for forming a thick-walled straight-tapered composite structure part, the specific steps of which are as follows:

[0014] S1: Determine the gap between the inner and outer spinning wheels based on the wall thickness of the spinning blank. The gap between the inner and outer spinning wheels is the same as the wall thickness of the blank.

[0015] S2: Spinning preparation. Before spinning, the deformation area of ​​the part is heated by induction heating to reach the initial forging temperature of the raw material. The spinning device is then fed into the part in the initial processing state.

[0016] S3: Spinning process. The forming device rotates under the drive of the spinning machine swing arm. At the same time, the forming wheel also needs to rotate in the opposite direction with the swing arm. Under the action of the inner spinning wheel, outer spinning wheel and forming wheel, the part will undergo plastic deformation and the angle will gradually change to reach the required angle size, so as to realize the forming of the straight cone composite structure part.

[0017] S4: After spinning is completed, the forming device is removed from the part by the machine tool feed motion, the part is disassembled, and the processing is completed.

[0018] Furthermore, the entire spinning process in S3 also requires supplemental heating by a flame heating system based on the part temperature to ensure that the part is processed above the final forging temperature.

[0019] The present invention has at least one or more of the following technical effects: the products produced by the present invention have no longitudinal or circumferential welds and have a high product quality level; the device used in the present invention is easy to adjust, has a short development cycle, high workpiece size control accuracy, and high spinning yield; the present invention uses a CNC spinning machine for processing, which is suitable for the production of large and medium-sized batch parts and has high processing efficiency. Attached Figure Description

[0020] Figure 1 : Schematic diagram of the forming tooling for the straight cone composite structure part of this utility model;

[0021] Figure 2 : Schematic diagram of the spinning process of the straight tapered composite structure part of this utility model;

[0022] Among them: 1-base, 2-inner rotating wheel, 3-outer rotating wheel, 4-inner rotating wheel shaft, 5-outer rotating wheel shaft, 6-bearing, 7-nut, 8-straight tapered composite workpiece, 9-straight tapered composite workpiece blank, 10-machine tool chuck, 11-machine tool faceplate. Detailed Implementation Plan

[0023] The difference between this solution and the general spinning process is as follows: General spinning usually uses an internal mold and an external spinning wheel. Since the internal mold is generally fixed at an angle, general spinning can only process parts with fixed angles. However, the spinning device involved in this patent can process straight-cone composite structure parts with arbitrary angles.

[0024] This utility model discloses a spinning forming method for thick-walled straight-tapered composite structural parts, comprising the following steps: First, determining the gap between the inner and outer spinning wheels based on the wall thickness of the spinning blank; the gap between the inner and outer spinning wheels is the same as the wall thickness of the blank. Second, preparing for spinning: before spinning, induction heating is used to heat the deformation area of ​​the part to reach the initial forging temperature of the raw material, and the spinning wheel device is fed into the initial processing state of the part. Third, spinning: the forming device rotates under the drive of the spinning machine's swing arm, while the shaping wheel also rotates in the opposite direction with the swing arm. Under the action of the inner spinning wheel, outer spinning wheel, and shaping wheel, the part undergoes plastic deformation, and the angle gradually changes to reach the required angle dimension, thus forming the straight-tapered composite structural part. Fourth, after spinning, the forming device is removed from the part by the machine tool's feed motion, the part is disassembled, and the processing is completed.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all of the embodiments obtained. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0026] A forming device for thick-walled straight-cone composite structure parts, such as Figure 1As shown. The forming device includes an inner rotating wheel 2, an outer rotating wheel 3, a bearing 6, a nut 7, an inner rotating wheel shaft 4, an outer rotating wheel shaft 5, and a base 1. The inner rotating wheel 2 is fixedly connected to the base 1 via the inner rotating wheel shaft 4 and the nut 7; the outer rotating wheel 3 is fixedly connected to the base 1 via the outer rotating wheel shaft 5 and the nut 7; the inner rotating wheel 2 and the outer rotating wheel 3 are respectively connected at both ends by bearings 6 and nuts 7 to achieve free rotational movement; the base 1 is mounted on a spinning machine. The base 1 is mounted on the rotating shaft of a swing-arm type spinning machine with rotational feed control function.

[0027] This implementation case is achieved through the following steps, as follows: Figure 2 As shown.

[0028] For blanking, determine the diameter and wall thickness of the tube blank 9 based on the final dimensions of the straight-cone composite workpiece 8. Considering that the wall thickness will be reduced after the conical section of the part is spun, the greater the difference in part diameter, the more obvious the thinning will be. The wall thickness of the blank 3 should generally be reserved according to the ratio of the maximum conical section diameter to the blank diameter.

[0029] Spinning, which includes the following steps:

[0030] 1) The blank 3 is mounted on the machine tool faceplate 11. It can be mounted by chuck 10 or by a specially designed chuck sleeve.

[0031] 2) After the clamping is completed, for steel materials, induction heating is used to heat the deformed areas of the parts; for aluminum alloy materials, flame heating can be used.

[0032] 3) Once the blank 9 reaches the deformation temperature, remove the induction heater and use flame heating to replenish the heat, ensuring that the workpiece is always within the appropriate forming temperature range.

[0033] 4) Move the forming device to the starting position. At this time, the gap between the inner rotating wheel 5 and the outer rotating wheel 6 is the blank wall thickness, and the forming wheel 4 presses against the blank end face.

[0034] 5) The blank rotates under the drive of the flower plate 11, the forming device rotates along the workpiece inflection point as the axis, and the forming wheel 4 also rotates along the inflection point, always pressing against the end face of the workpiece.

[0035] 6) The wall thickness of the workpiece cone section can be adjusted by adjusting the gap between the inner rotating wheel 2 and the outer rotating wheel 3. At the same time, the shape accuracy of the workpiece is adjusted by the forming wheel 4. After the workpiece reaches the required shape and size, the forming device is removed from the workpiece.

[0036] 7) Remove workpiece 8 from the face plate 10 to achieve the forming of the straight cone composite structure part.

[0037] This utility model uses a tube blank 9, made of steel, aluminum alloy, or other metal materials. The gap between the inner spinning wheel 2 and the outer spinning wheel 3 should be adjusted according to the actual processing conditions to control the wall thickness and outer diameter of the product after spinning. The wall thickness of the workpiece can be controlled together with the spinning gap by the feed motion of the forming wheel 4 in the generatrix direction of the workpiece. The length 2 of the inner spinning wheel of the forming device is generally greater than that of the outer spinning wheel 3, and the spinning wheel mostly adopts a conical structure. While the spinning wheel and the forming device rotate together, they can also perform feed motion to achieve multi-axis linkage.

[0038] This invention allows the forming device to be used for forming parts with various angles and wall thicknesses by adjusting the structure of the inner and outer rotating wheels. The product's cone angle and wall thickness are determined by the rotation angle and spinning gap of the forming device, and these parameters can be adjusted by a servo control system.

[0039] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of the embodiments of this utility model. Therefore, if these modifications and variations to the embodiments of this utility model fall within the scope of the claims of this utility model and their equivalents, then this utility model also intends to include these modifications and variations.

Claims

1. An apparatus for forming a thick-walled straight-tapered composite structural part, comprising: It comprises: inner runner (2), outer runner (3), bearing (6), nut (7), inner runner shaft (4), outer runner shaft (5) and base (1), the inner runner (2) is fixedly connected with the base (1) through the inner runner shaft (4) and the nut (7); the outer runner (3) is fixedly connected with the base (1) through the outer runner shaft (5) and the nut (7); the inner runner (2) and the outer runner (3) are respectively matched through the bearing (6) and the nut (7) at both ends, and free rotation movement is realized; the base (1) is installed to the spinning machine.

2. The apparatus of claim 1 wherein: The base (1) is installed on the swing arm type spinning machine rotating shaft with rotation feed control function.

3. The apparatus of claim 1 wherein: The inner runner (2) and the outer runner (3) are selected from hot die steel.

4. The apparatus of claim 3 wherein: The inner runner and the outer runner are processed by any one of 5CrMnMo, 4Cr5MoSiV and 3Cr3Mo3W2V.

5. The apparatus of claim 1 wherein: The inner runner shaft (4) and the outer runner shaft (5) are made of 42CrMo, 30CrMnSiA or other medium carbon alloy steel.

6. The apparatus of claim 1 wherein: The base (1) is processed by medium carbon steel, medium carbon alloy steel forging or casting.

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