Aluminum alloy profile machining system

Abstract

The utility model relates to the field of metal material machining and forming, in particular to an aluminum alloy section machining system which comprises a feeding assembly, a first heater, an extrusion forming assembly, a second heater and a cooling assembly. Aluminum alloy casting bars are provided for the whole machining system through the feeding assembly; the first heater comprises a first heating cavity, and the aluminum alloy casting bar is heated through the first heating cavity; the extrusion forming assembly is used for carrying out extrusion forming on the heated aluminum alloy casting bar to obtain a tubular blank; the second heater comprises a second heating cavity, and the tubular blank is heated through the second heating cavity; and the cooling assembly is used for cooling the heated tubular blank. The method is reasonable in layout, composition segregation and abnormal growth of crystal grains in the welding line of the seamed pipe can be eliminated, the defects of cracks and slag inclusion occurring during welding of the aluminum alloy seamed pipe are reduced, and the service life of a product is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of metal material processing and forming, and particularly relates to an aluminum alloy profile processing system. BACKGROUND

[0002] The aluminum alloy extruded pipe includes a seamed pipe and a seamless pipe, wherein the welding line of the seamed pipe is formed in the extrusion process, that is, the aluminum alloy in a hot melt state is divided into several different aluminum alloys by a flow divider after being subjected to an extrusion force, and then the aluminum alloys are fused in a welding chamber and are extruded into a pipe. Generally, the pipe obtained by forward extrusion using the die with the flow divider is called a seamed pipe. Another type is to directly hard top the aluminum alloy using an extruded rod, and the aluminum alloy is extruded into a pipe by reverse extrusion, and the pipe obtained is called a seamless pipe.

[0003] The aluminum alloy liquid cooling plate is a heat dissipation component for liquid cooling made of aluminum alloy as a main material, and the pipe nozzle of the cooling liquid inlet and outlet is usually manufactured by machining an aluminum rod or directly manufactured by using a seamless pipe. If the pipe nozzle is manufactured by machining an aluminum rod, the processing cost is high and the efficiency is low. If the pipe nozzle is manufactured by using a seamless pipe, the price is high. Therefore, the aluminum alloy extruded seamed pipe is a cost-controllable and efficient pipe nozzle part production mode. However, the aluminum alloy extruded seamed pipe is directly used after being extruded and formed at present, and it is verified by actual verification that the conventional aluminum alloy seamed pipe is prone to cracks, slag inclusion and other defects when being welded, and the product has corrosion leakage at the profile welding line during service. SUMMARY

[0004] The utility model aims at providing an aluminum alloy profile processing system, which has a reasonable layout, can eliminate composition segregation and abnormal grain growth in the welding line of the seamed pipe, reduce cracks and slag inclusion defects of the aluminum alloy seamed pipe during welding, and improve the service life of the product.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The application discloses an aluminum alloy profile processing system which comprises a feeding assembly, a first heater, an extrusion molding assembly, a second heater and a cooling assembly; the aluminum alloy cast bar is provided to the whole processing system through the feeding assembly; the first heater comprises a first heating cavity, a feeding port arranged at one end of the first heating cavity is connected with a discharging port of the feeding assembly, a discharging port arranged at the other end of the first heating cavity is connected with a feeding port of the extrusion molding assembly, and the aluminum alloy cast bar is heated through the first heating cavity; the extrusion molding assembly is used for extruding and molding the heated aluminum alloy cast bar to obtain a tubular blank; the second heater comprises a second heating cavity, a feeding port arranged at one end of the second heating cavity is connected with a discharging port of the extrusion molding assembly, a discharging port arranged at the other end of the second heating cavity is connected with the cooling assembly, and the tubular blank is heated through the second heating cavity; and the cooling assembly is used for cooling the heated tubular blank.

[0007] Further, the extrusion molding assembly comprises an upper die and a lower die, the feeding surface of the upper die is provided with a plurality of shunt bridges, the shunt bridges are spaced apart to form at least two shunt holes, a die core is arranged at the center position of the upper die and is integrally formed with the shunt bridges, one end of the die core extends into the lower die cavity, the lower die is provided with a welding chamber, a working belt and a discharging hole, the welding chamber is communicated with the shunt holes, the working belt is arranged at the bottom end of the welding chamber, and the discharging hole is arranged at the tail end of the lower die and is connected with the working belt.

[0008] Further, the width of the shunt bridge is 20-25 mm; and / or the depth of the welding chamber is 50-80 mm.

[0009] Further, the application further comprises a hot shearing assembly which is arranged between the discharging port of the first heating cavity and the feeding port of the extrusion molding assembly and is used for shearing the heated aluminum alloy cast bar.

[0010] Further, the application further comprises a stretching assembly which is arranged between the discharging port of the extrusion molding assembly and the feeding port of the second heating cavity and is used for straightening and sizing the tubular blank.

[0011] The utility model discloses the following unexpected beneficial effect has: the utility model discloses a first heater is arranged at the front end of extrusion forming assembly, and the first heating cavity of first heater is used to heat aluminum alloy cast bar, and the segregation of component in aluminum alloy cast bar is eliminated, and the function of homogenizing organization is played, and the plasticity of bar material can be increased, and good condition is created for subsequent efficient extrusion and extrusion section grain recrystallization. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The structure schematic diagram of the aluminum alloy section bar processing system is shown.

[0013] Figure 2 The structure schematic diagram of the extrusion forming assembly is shown.

[0014] Figure 3 The arrangement schematic diagram of the hot shearing assembly is shown.

[0015] Figure 4 The arrangement schematic diagram of the stretching assembly is shown.

[0016] In the drawing, 1 - feeding assembly, 2 - first heater, 3 - extrusion forming assembly, 31 - upper die, 32 - lower die, 33 - shunt bridge, 34 - shunt hole, 35 - die core, 36 - welding chamber, 37 - work belt, 38 - discharge port, 4 - second heater, 5 - cooling assembly, 6 - hot shearing assembly, 7 - stretching assembly. DETAILED DESCRIPTION

[0017] The implementation of the utility model will be explained below with reference to the drawings and preferred embodiments, and other advantages and effects of the utility model can be easily understood by those skilled in the art from the content disclosed in the specification. The utility model can also be implemented or applied by another different specific embodiment, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. It should be understood that the preferred embodiments are only for illustrating the utility model, and are not intended to limit the protection scope of the utility model.

[0018] It is to be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and the drawings only show the components related to the present application, rather than being drawn according to the number, shape and size of the components in actual implementation, and the shape, number and proportion of each component in actual implementation can be arbitrarily changed, and the component layout pattern can also be more complex.

[0019] In an embodiment, referring to Figure 1 The present application provides an aluminum alloy profile processing system, which comprises a feeding assembly 1, a first heater 2, an extrusion molding assembly 3, a second heater 4 and a cooling assembly 5. The feeding assembly 1 provides aluminum alloy cast bars to the entire processing system. The first heater 2 comprises a first heating cavity, a feeding port arranged at one end of the first heating cavity is connected with a discharging port of the feeding assembly 1, a discharging port arranged at the other end of the first heating cavity is connected with a feeding port of the extrusion molding assembly 3, and the first heating cavity is used for heating the aluminum alloy cast bars. The extrusion molding assembly 3 is used for extruding and molding the heated aluminum alloy cast bars to obtain tubular blanks. The second heater 4 comprises a second heating cavity, a feeding port arranged at one end of the second heating cavity is connected with a discharging port of the extrusion molding assembly 3, a discharging port arranged at the other end of the second heating cavity is connected with the cooling assembly 5, and the second heating cavity is used for heating the tubular blanks. The cooling assembly 5 is used for cooling the heated tubular blanks.

[0020] The first heater 2 is arranged at the front end of the extrusion molding assembly 3, the first heating cavity of the first heater 2 is used for heating the aluminum alloy cast bars, the segregation of components in the aluminum alloy cast bars is eliminated, the effect of homogenizing the organization is achieved, the plasticity of the bars is increased, and good conditions are created for subsequent efficient extrusion and grain recrystallization of the extruded profiles. The second heater 4 is arranged at the rear end of the extrusion molding assembly 3, the second heating cavity of the second heater 4 is used for heating the tubular blanks, the segregation of components and abnormal growth of grains in the welding line are eliminated, the cracks and slag inclusion defects that occur when the aluminum alloy has-seam pipes are welded are reduced, and the argon arc welding performance and corrosion resistance of the aluminum alloy profiles are improved. The prepared aluminum alloy profiles can be used for argon arc welding of aluminum alloy liquid cooling plates, the production cost of parts of the liquid cooling plate can be greatly reduced, and the development of the aluminum alloy liquid cooling industry is promoted.

[0021] The feeding assembly 1 is the starting part of the aluminum alloy profile processing system, including a hopper, a conveyor belt, a lifting device, and a discharge port adjusting mechanism. The hopper is used to store a large amount of aluminum alloy cast bar, and different specifications and batches of bar can be stored according to production needs. The conveyor belt is responsible for smoothly conveying the bar out of the hopper, usually using a conveyor belt material with high friction and wear resistance to ensure that the bar does not slip or damage during the conveying process. The lifting device can lift the bar to the appropriate height as needed for subsequent operations. The discharge port adjusting mechanism accurately controls the discharge speed and amount of aluminum alloy cast bar according to different processing rhythms and the feeding requirements of subsequent components. Specifically, this adjustment function is realized through electric or pneumatic actuators, and the operator can set the corresponding parameters in the control system to ensure stable feeding operation.

[0022] The first heating cavity of the first heater 2 is wrapped with a material with good heat insulation performance to reduce heat loss and improve energy utilization. Inside it is provided with heating elements such as resistance wire heating or induction heating coil, which are uniformly distributed on the inner wall of the heating cavity to ensure that the aluminum alloy cast bar can receive uniform heat transfer in the heating cavity.

[0023] The first heating cavity is also equipped with temperature sensors distributed at different positions to accurately monitor the temperature at different positions. According to the data feedback by these sensors, the control system can adjust the power of the heating elements to ensure that the temperature deviation in the entire heating cavity is controlled within the preset range to provide ideal temperature conditions for subsequent extrusion molding operations. Sealing devices are provided at the inlet and outlet of the first heater 2 to prevent heat loss from the connection parts and to prevent external cold air from entering the heating cavity and affecting the heating effect.

[0024] The extrusion molding assembly 3 includes an extruder, a die, and a die replacement assembly. The extruder is usually a powerful pressure device of hydraulic or mechanical type, which can generate a huge extrusion force to push the heated aluminum alloy cast bar through the die. The hydraulic extruder uses the pressure of hydraulic oil to drive the extrusion shaft, which has the advantages of stable pressure and large adjustable range. The mechanical extruder converts the rotary motion of the motor into the linear motion of the extrusion shaft through mechanical transmission devices such as screw or crank linkage, which has the characteristics of compact structure and high speed. The die is a key component that determines the shape of the aluminum alloy profile, and is accurately designed and manufactured according to the shape and size of the tubular blank to be produced. The die is usually made of high-strength and high-hardness alloy steel, and the surface is treated to improve its wear resistance and corrosion resistance. The flow channel inside the die is optimized to ensure uniform flow of aluminum alloy during extrusion to avoid defects. The die replacement assembly facilitates quick replacement of the die when switching between different product specifications, which can be realized through automatic or semi-automatic mode to improve production efficiency.

[0025] When the heated aluminum alloy cast bar enters the feed inlet of the extrusion forming assembly 3, the extrusion force applied by the extruder pushes the bar towards the die. Under the action of the extrusion force, the aluminum alloy material plastically deforms under the constraint of the die, gradually fills the cavity of the die, and finally forms the required tubular blank.

[0026] Similar to the first heating cavity, the second heating cavity of the second heater 4 also adopts efficient heat insulation and heating element layout, but since it processes the tubular blank that has been extrusion formed, the heating method and temperature control are different. The power and layout of the heating elements will be adjusted according to the shape and size of the tubular blank to ensure the uniformity of heating.

[0027] The cooling assembly 5 can adopt various cooling methods such as air cooling, water cooling or air-water combined cooling. Air cooling is usually achieved by arranging multiple powerful fans around the tubular blank to generate high-speed airflow to carry away the heat of the blank; water cooling is achieved by immersing or spraying cooling water on the tubular blank to achieve rapid cooling; air-water combined cooling combines the advantages of both, first air cooling and then water cooling to achieve better cooling effect.

[0028] A circulation system for the cooling medium is also provided in the cooling assembly 5 to ensure the stability of the temperature and flow of the cooling medium. For the water cooling system, a dedicated water tank and filter are provided to maintain the cleanliness and temperature of the cooling water within a suitable range.

[0029] The structure of the cooling assembly 5 also considers the uniformity of cooling. For the tubular blank, multiple cooling nozzles or cooling air nozzles are provided to ensure uniform cooling of all parts of the blank and prevent deformation and residual stress caused by uneven cooling.

[0030] The various components of the utility model work closely together, and through precise control and optimization, continuous production of high-quality aluminum alloy profiles can be achieved.

[0031] As a preferred embodiment of the utility model, referring to Figure 2 The extrusion forming assembly 3 includes an upper die 31 and a lower die 32, and the upper die 31 is provided with a plurality of shunt bridges 33 on the feed surface, and the shunt bridges 33 are separated to form at least two shunt holes 34. The number and size of the shunt holes 34 are determined according to the shape and size of the required tubular blank and the flow of the aluminum alloy cast bar. By reasonably designing the shape and distribution of the shunt holes 34, the effective shunting of the aluminum alloy material can be realized, so that the material can be more uniformly distributed in the die before entering the subsequent welding chamber 36, thereby improving the flowability and uniformity of the material. For example, for larger size tubular blanks, more and larger shunt holes may be needed to ensure sufficient material supply.

[0032] The upper mold 31 has a mold core 35 integrally formed with the flow divider 33 at its center. This integral design enhances the structural strength of the entire mold. There is no connecting gap between the integral mold core 36 and the flow divider 33, avoiding material leakage and stress concentration problems that may occur under high pressure, thereby extending the service life of the mold.

[0033] One end of the mold core 35 extends into the cavity of the lower mold 32. The size and shape of the mold core 35 precisely match the inner diameter of the required tubular blank, and its surface finish is required to ensure the smoothness and dimensional accuracy of the inner surface of the tubular blank. Simultaneously, the length of the mold core 35 extends to a certain depth into the cavity of the lower mold 32, which helps to provide stable support and guidance for the flow of material during subsequent welding and forming processes, allowing the material to better form a tubular structure as it flows around the mold core 35.

[0034] The lower mold 32 is provided with a welding chamber 36, a working belt 37 and a discharge hole 38. The welding chamber 36 is connected to the diversion hole 34. The working belt 37 is located at the bottom end of the welding chamber 36. The discharge hole 38 is located at the tail end of the lower mold 32 and is connected to the working belt 37.

[0035] During the extrusion molding process, the aluminum alloy material diverted through the diversion orifice 34 flows into the welding chamber 36. The shape and volume of the welding chamber 36 are designed based on the flow rate of the aluminum alloy material, the required shape of the tubular blank, and its wall thickness. Its main function is to re-converge and weld the aluminum alloy material flowing in from different diversion orifices, eliminating gaps and defects generated during the diversion process, and allowing the material to re-fuse into a whole within this area. Inside the welding chamber 36, the material is subjected to certain pressure and temperature, promoting atomic diffusion and the recombination of metallic bonds, thereby ensuring the strength and density of the final tubular blank.

[0036] The length and width of the working strip 37 have a significant impact on the forming accuracy and surface quality of the aluminum alloy material. The length of the working strip 37 is generally determined based on the material properties and extrusion speed. An appropriate working strip 37 length ensures sufficient resistance as the material passes through, guaranteeing uniform extrusion and preventing deformation or cracking caused by speed differences. The width of the working strip 37 is designed based on the wall thickness of the tubular blank; a working strip 37 that is too wide or too narrow will affect the dimensional accuracy and quality of the product.

[0037] The shape and size of the discharge hole 38 directly determine the final shape and size of the tubular blank. The design of the discharge hole 38 needs to consider the shrinkage of the material. When designing the mold, the size of the discharge hole 38 is appropriately enlarged or reduced according to the thermal expansion and shrinkage characteristics of the aluminum alloy material to ensure that the size of the final product meets the design requirements. The smoothness of the inner wall of the discharge hole 38 is also important, which affects the surface quality of the tubular blank and the difficulty of demolding.

[0038] In the actual extrusion molding process, the heated aluminum alloy casting rod is fed into the upper mold 31. Under the action of the extrusion force, the material is first uniformly distributed into the distribution hole 34 through the distribution bridge 33. The distributed material flows into the welding chamber 36 of the lower mold 32. In the welding chamber 36, the material is reassembled and welded to eliminate the gaps and defects caused by distribution. Then, the welded material passes through the working belt 37, and under the resistance and guidance of the working belt 37, the material is further shaped, and finally extruded through the discharge hole 38 to form a tubular blank. During the entire process, the core 35 of the upper mold 31 ensures the shape of the inner hole of the tubular blank, and the various parts of the lower mold 32 work together to ensure the quality of the outer surface, wall thickness and overall shape of the tubular blank.

[0039] Further, the width of the distribution bridge 33 is 20-25mm. If the distribution bridge 33 is too narrow, it is easy to deform or even break under the action of the huge extrusion force, which cannot ensure the uniform distribution of the aluminum alloy material, thereby affecting the quality consistency of the tubular blank. On the contrary, if the distribution bridge 33 is too wide, although it can enhance the structural strength, it will occupy too much space on the feeding surface of the upper mold 31, resulting in a decrease in the number or size of the distribution holes 34, limiting the passing amount of the aluminum alloy material and reducing the production efficiency.

[0040] The depth of the welding chamber 36 is 50-80mm. If the depth of the welding chamber 36 is too shallow, the material cannot be fully fused, which may cause defects such as gaps or holes in the tubular blank, seriously affecting its mechanical properties. If the depth is too large, although it can increase the welding time, it will increase the overall size and weight of the mold, increase the production cost, and also may cause the material to stay in the welding chamber for too long, causing overheating and other problems, which also affect the product quality.

[0041] As a preferred embodiment of the utility model, referring to Figure 3 The aluminum alloy profile processing system further comprises a hot shearing assembly 6 arranged between the discharge port of the first heating cavity and the feeding port of the extrusion molding assembly 3, which is used for shearing the heated aluminum alloy casting rod.

[0042] The hot shearing assembly 6 can accurately control the length of the aluminum alloy cast rod according to production requirements, and ensure the size consistency of each rod. This is of great significance to the size precision control of the product in the subsequent extrusion molding process, and reduces the product quality problems caused by the length difference of the rod.

[0043] As a preferred embodiment of the utility model, referring to Figure 4 The aluminum alloy profile processing system further comprises a stretching assembly 7 arranged between the discharge port of the extrusion molding assembly 3 and the feeding port of the second heating cavity, for straightening and sizing stretching of the tubular blank.

[0044] The tubular blank discharged from the extrusion molding assembly 3 first enters the stretching chuck of the stretching assembly 7, and the chuck quickly clamps the blank. The stretching machine is started, and according to the preset stretching length and tension parameters, the tubular blank is subjected to tension. During the stretching process, the straightening device works synchronously, and the blank is straightened through the straightening roller to eliminate the bending deformation of the blank that may be generated in the extrusion process. The length measuring device monitors the length change of the blank in real time, and when the blank reaches the predetermined stretching length, the control system immediately stops the operation of the stretching machine, and the straightening and sizing stretching of the tubular blank are completed. Subsequently, the tubular blank subjected to the stretching treatment is conveyed to the second heating cavity for subsequent heating.

[0045] The stretching assembly 7 can effectively correct the bending deformation of the tubular blank generated in the extrusion process, so that it meets the higher straightness requirement. At the same time, through the accurate sizing stretching, the length accuracy of the blank is ensured, and the strict requirements of different products on the size are met. The appropriate stretching treatment can improve the internal organizational structure of the tubular blank, so that the grains of the material are more refined and uniform, thereby improving the mechanical properties of the product, such as strength and toughness. Through the straightening and sizing stretching of the tubular blank, the product scrap rate caused by the size deviation and shape deformation is reduced, the qualified rate of the entire production process is improved, and the production cost is reduced.

[0046] The above embodiments are only preferred embodiments for fully illustrating the utility model, and the protection scope of the utility model is not limited thereto. The equivalent substitutions or transformations made by the person skilled in the art on the basis of the utility model are within the protection scope of the utility model.

Claims

1. An aluminum alloy profile machining system characterized by, It comprises a feeding assembly (1), a first heater (2), an extrusion molding assembly (3), a second heater (4) and a cooling assembly (5). The feeding assembly (1) provides the aluminum alloy cast bar to the whole processing system. The first heater (2) comprises a first heating cavity, a feeding port arranged at one end of the first heating cavity is connected with a discharging port of the feeding assembly (1), a discharging port arranged at the other end of the first heating cavity is connected with a feeding port of the extrusion molding assembly (3), and the aluminum alloy cast bar is heated through the first heating cavity. The extrusion molding assembly (3) is used for extruding and molding the heated aluminum alloy cast bar to obtain a tubular blank. The second heater (4) comprises a second heating cavity, a feeding port arranged at one end of the second heating cavity is connected with a discharging port of the extrusion molding assembly (3), a discharging port arranged at the other end of the second heating cavity is connected with the cooling assembly (5), and the tubular blank is heated through the second heating cavity. The cooling assembly (5) is used for cooling the heated tubular blank.

2. The aluminum alloy extrusion processing system of claim 1, wherein: The extrusion molding assembly (3) comprises an upper die (31) and a lower die (32), the upper die (31) is provided with a plurality of shunt bridges (33) on the feeding surface, the shunt bridges (33) are separated to form at least two shunt holes (34), a mold core (35) is arranged at the center position of the upper die (31) and integrally formed with the shunt bridges (33), and one end of the mold core (35) extends into the cavity of the lower die (32). The lower die (32) is provided with a welding chamber (36), a working belt (37) and a discharging hole (38), the welding chamber (36) is communicated with the shunt hole (34), the working belt (37) is arranged at the bottom end of the welding chamber (36), and the discharging hole (38) is arranged at the tail end of the lower die (32) and connected with the working belt (37).

3. The aluminum alloy extrusion processing system of claim 2, wherein: The width of the shunt bridge (33) is 20-25mm. The depth of the welding chamber (36) is 50-80mm.

4. The aluminum alloy extrusion processing system of claim 1, wherein: The hot shearing assembly (6) is arranged between the discharging port of the first heating cavity and the feeding port of the extrusion molding assembly (3) and is used for shearing the heated aluminum alloy cast bar.

5. The aluminum alloy extrusion processing system of claim 1, wherein: The stretching assembly (7) is arranged between the discharging port of the extrusion molding assembly (3) and the feeding port of the second heating cavity and is used for straightening and sizing the tubular blank.

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