Aluminum alloy thin-wall part machining process

Abstract

The invention discloses a machining process for an aluminum alloy thin-wall part, and belongs to the technical field of aluminum alloys. The method mainly comprises the steps that an aluminum alloy thin-wall part blank is adsorbed and fixed through a suction cup, the back face of the aluminum alloy thin-wall part and the front face of the alloy thin-wall part are roughly milled in a regional segmentation mode, and parts matched with positioning holes are reserved; the reverse side of the semi-finish-milling aluminum alloy thin-wall part, the reverse side of the finish-milling aluminum alloy thin-wall part, the front side of the regional segmented semi-finish-milling aluminum alloy thin-wall part and the front side of the regional segmented finish-milling aluminum alloy thin-wall part enable the size of the aluminum alloy thin-wall part to meet the requirement, and meanwhile, aging treatment is added between semi-finish-milling and finish-milling, so that the service life of the aluminum alloy thin-wall part is prolonged. And the milled aluminum alloy thin-wall part is subjected to bench worker treatment, inspection and warehousing. According to the machining process for the aluminum alloy thin-wall part, the suction cups are arranged for clamping, regional segmented cutting and shaping aging, and therefore the effects that when the aluminum alloy thin-wall part is machined, the machining efficiency is improved, and stress generated during machining is eliminated are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of aluminum alloys, and in particular to a processing technology for aluminum alloy thin-walled parts. Background Art

[0002] Aluminum alloy thin-walled parts refer to rotating parts with a ratio of wall thickness to curvature radius less than 1:20, or frames, beams, wall panels, webs and ribs with a wall thickness of less than 3mm. Aluminum alloy thin-walled parts are easily deformed by various forces (such as clamping force, cutting force, etc.) during processing due to their thin wall thickness and low rigidity. Aluminum alloy materials have high thermal conductivity, and the heat generated during cutting can easily cause the workpiece to expand due to heat, thereby affecting the processing accuracy; However, in actual processing, the clamping method may cause processing interference problems, as well as shortcomings such as cumbersome clamping and slow clamping speed. In addition, the tooling may easily cause deformation of the workpiece, or the deformed workpiece may be unable to be clamped. At the same time, the existing cutting method is more likely to cause deformation of the workpiece, and the existing aging method is usually heating aging under natural conditions, which makes the stress release during the aging process completely uncontrollable, so the deformation of the workpiece due to aging is also uncontrollable.

[0003] Therefore, it is necessary to provide a processing technology for aluminum alloy thin-walled parts to solve the above problems.

[0004] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0005] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide a processing technology for aluminum alloy thin-walled parts, which solves the problem that when processing aluminum alloy thin-walled parts, conventional tooling press-fitting is used for processing, thereby causing deformation of aluminum alloy thin-walled parts.

[0006] The technical solution adopted by the present application to solve the technical problem is: a processing technology for aluminum alloy thin-walled parts, including: In the first step, the aluminum alloy thin-walled part blank is fixed by suction using a suction cup, and the reverse side of the aluminum alloy thin-walled part is roughly milled, while the front side of the aluminum alloy thin-walled part is roughly milled in sections, and parts that match the positioning holes are reserved around the aluminum alloy thin-walled part; The second step is to place the processed aluminum alloy thin-walled parts into an aging fixture for aging treatment; The third step is to perform semi-finishing milling on the reverse side of the aluminum alloy thin-walled part after aging treatment, and perform semi-finishing milling on the front side of the aluminum alloy thin-walled part in sections; The fourth step is to put the aluminum alloy thin-walled parts after semi-finishing milling into the aging fixture again for aging treatment. The aging treatment conditions are the same as the first time. Step 5: After aging treatment, the reverse side of the aluminum alloy thin-walled part is fine-milled to achieve the desired size. At the same time, the front side of the aluminum alloy thin-walled part is fine-milled in sections to achieve the desired size. Step 6: Perform bench work on the processed aluminum alloy thin-walled parts to remove burrs, polish and clean them; Step 7: Inspection and warehousing.

[0007] Furthermore, the suction cup in the first step includes a base, and a plurality of air guide grooves are provided at one end of the base. Air guide holes are provided at the ends of the air guide grooves. The air guide holes penetrate the base and extend to one side of the base.

[0008] Furthermore, a positioning hole is provided on the base.

[0009] Furthermore, one end of the base is provided with a plurality of installation grooves at a position close to the air guide groove, and sealing gaskets are arranged in the installation grooves.

[0010] Furthermore, the area segmentation processing in the first step, the third step and the fifth step is specifically to perform cutting in sequence according to different area divisions.

[0011] Furthermore, the back surface processing of the aluminum alloy thin-walled part in the first step has a processing allowance of 2 mm, and the front area segment processing of the aluminum alloy thin-walled part in the first step has a processing allowance of 2 mm.

[0012] Furthermore, the back surface processing of the aluminum alloy thin-walled part in the third step has a processing allowance of 0.5 mm, and the front area segment processing of the aluminum alloy thin-walled part in the third step has a processing allowance of 0.5 mm.

[0013] Furthermore, the aging fixture of the second step includes a base plate, a plurality of installation cavities are provided on the base plate, a sliding block is slidably arranged in the installation cavity, a sliding groove is provided on the sliding block, a positioning bolt is arranged inside the sliding groove, the positioning bolt passes through the sliding groove and is threadedly connected to the base plate, a concave block is fixedly arranged on one side of the sliding block, a locking bolt is threadedly connected to one side of the concave block, and supporting blocks are fixedly arranged at both ends of the base plate between the installation cavities on both sides, and screws are threadedly arranged on one group of the supporting blocks.

[0014] Furthermore, the process steps of the aging treatment in the second step and the fourth step are as follows: The first step is to clamp the aluminum alloy thin-walled part through the aging fixture as required to ensure that the aluminum alloy thin-walled part is stable and in the correct position; The second step is to heat the empty furnace to 160° before starting the aging treatment, keep it for 3 minutes, open the furnace door, and push the aluminum alloy thin-walled parts into the furnace, moving as slowly as possible to avoid collision; Step 3: Heat at 160° for 3 hours; Step 4: After heating, turn off the power first, then open the furnace door, pull out the aging fixture smoothly, and continue to hang it to air cool to room temperature; The fifth step is to inspect the workpiece after aging treatment to ensure that it meets the relevant requirements.

[0015] The beneficial effect of the present application is that the present application provides a processing technology for aluminum alloy thin-walled parts, which improves the processing efficiency and eliminates the stress generated during processing by setting a suction cup for clamping and regional segmented cutting and shaping aging.

[0016] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is an overall schematic diagram of a processing technology for aluminum alloy thin-walled parts in this application; Figure 2 for Figure 1 Schematic diagram of the middle suction cup tooling; Figure 3 for Figure 1 Exploded diagram of the middle suction cup tooling; Figure 4 for Figure 1 Schematic diagram of the medium aging fixture; Figure 5 for Figure 1 Exploded diagram of the medium aging fixture; Among them, the reference numerals in the figure are: 1. Suction cup; 2. Aluminum alloy thin-walled part; 10. Base; 12. Mounting groove; 13. Positioning hole; 14. Air guide hole; 15. Air guide groove; 3. Aging fixture; 30. Bottom plate; 31. Support block; 32. Mounting cavity; 33. Concave block; 35. Locking bolt; 36. Slide groove; 34. Positioning bolt; 38. Sliding block. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0020] like Figure 1-Figure 4 As shown, the present application provides a processing technology for aluminum alloy thin-walled parts, including a dedicated tooling and an aluminum alloy thin-walled part 2 for processing, wherein the dedicated tooling is divided into a suction cup 1 for adsorption and clamping and an aging fixture 3 used for shaping in heating aging treatment; like Figure 1-Figure 2 As shown, the suction cup 1 includes a base 10, and one end of the base 10 is suitable for adsorbing and clamping the aluminum alloy thin-walled part 2, and a plurality of groups of air guide grooves 15 are provided at one end of the base 10 for adsorbing and clamping the aluminum alloy thin-walled part 2, and the ends of the air guide grooves 15 are all provided with air guide holes 14, and the air guide holes 14 penetrate the base 10 and extend to one side of the base 10. In the present application, the air guide holes 14 can be connected to an external vacuum extraction device through an air pipe so as to form a relatively closed vacuum chamber; When the suction cup 1 contacts the aluminum alloy thin-walled part 2 to be adsorbed, the external vacuum extraction device can be started to reduce the air pressure in the vacuum chamber. Since the air pressure in the vacuum chamber is lower than the external atmospheric pressure, a pressure difference is formed. This pressure difference makes the suction cup 1 and the aluminum alloy thin-walled part 2 tightly combined together, so that the aluminum alloy thin-walled part 2 is subjected to a relatively even force by adsorbing the entire bottom surface of the aluminum alloy thin-walled part 2, thereby effectively reducing the deformation of the workpiece caused by clamping; A positioning hole 13 is provided on the base 10 so as to facilitate positioning with the aluminum alloy thin-walled part 2; At the same time, in order to make the suction cup 1 run smoothly, a plurality of mounting grooves 12 are provided at one end of the base 10 near the air guide groove 15, and a sealing pad (not shown in the figure) is provided in the mounting groove 12 to prevent air from entering the vacuum chamber and affecting the air pressure in the vacuum chamber, thereby affecting the adsorption effect. In the present application, for the aluminum alloy thin-walled part 2 that has been deformed, it is only necessary to replace the sealing strip with foam to compensate for the deformation of the aluminum alloy thin-walled part 2, thereby achieving a sealing effect to ensure the smooth operation of the suction cup 1. At the same time, when processing the aluminum alloy thin-walled part 2, the aluminum alloy thin-walled part 2 is first clamped on the suction cup 1, and cut in sequence according to different area divisions. When programming, each program only processes the part of the area, and then the program is run in sections until the entire surface is fully processed before it is removed from the suction cup 1. By adopting the regional segmented cutting method, the processing is gradually completed by cutting small pieces of fragments, and large-area overall cutting is not performed, so as to slow down the speed of stress generation and achieve the purpose of not easily deforming during cutting; Based on the above suction cup 1, this application provides a complete set of processing technology as follows: In the first step, the aluminum alloy thin-walled part 2 blank is first fixed by suction using the suction cup 1, and the reverse side of the aluminum alloy thin-walled part 2 is roughly milled, leaving a machining allowance of 2 mm, and the front side of the aluminum alloy thin-walled part 2 is roughly milled in sections, also leaving a machining allowance of 2 mm, and parts cooperating with the positioning holes 13 are reserved around the aluminum alloy thin-walled part 2; The second step is to place the processed aluminum alloy thin-walled part 2 into an aging fixture 3 for aging treatment at a temperature of 160° C. for 3 hours. The third step is to perform semi-finishing milling on the reverse side of the aluminum alloy thin-walled part 2 after aging treatment, leaving a machining allowance of 0.5 mm, and perform semi-finishing milling on the front side of the aluminum alloy thin-walled part 2 in sections, also leaving a machining allowance of 0.5 mm; Step 4: put the semi-finished aluminum alloy thin-walled part 2 into the aging fixture 3 again for aging treatment. The aging treatment conditions are the same as the first time. Step 5: After aging treatment, the reverse side of the aluminum alloy thin-walled part 2 is finely milled to achieve the desired size. Meanwhile, the front side of the aluminum alloy thin-walled part 2 is finely milled in sections to achieve the desired size. Step 6: Perform bench work on the processed aluminum alloy thin-walled part 2 to remove burrs, polish and clean it; Step seven: inspection and storage.

[0021] In addition, in the above-mentioned aging treatment process, in order to prevent the workpiece from being deformed due to stress release, an aging fixture 3 is used during the aging treatment to limit the state of the aluminum alloy thin-walled part 2. The aging fixture 3 includes a bottom plate 30, and a plurality of mounting cavities 32 are provided on the bottom plate 30. A sliding block 38 is slidably provided in the mounting cavity 32, and a slide groove 36 is provided on the sliding block 38. At the same time, a positioning bolt 34 is provided inside the slide groove 36. The positioning bolt 34 passes through the slide groove 36 and is threadedly connected to the bottom plate 30, so that the sliding block 38 can be pushed to slide along the mounting cavity 32 under the restriction of the positioning bolt 34. When sliding to a suitable position, the positioning bolt 34 can be rotated to fix it, and the sliding block 38 can also be unlocked by rotating the positioning bolt 34 in the opposite direction. At the same time, a concave block 33 is fixedly provided on one side of the sliding block 38, and a locking bolt 35 is threadedly connected to one side of the concave block 33. When the aluminum alloy thin-walled part 2 is inserted into the groove of the concave block 33, it can be locked by the locking bolt 35; And at both ends of the bottom plate 30, there are fixedly provided with support blocks 31 between the mounting cavities 32 on both sides, and at the same time, a screw is threadedly provided on one of the support blocks 31 for cooperating with the support blocks 31 for pressing. When the aluminum alloy thin-walled part 2 is inserted into the groove of the concave block 33 and locked by the locking bolt 35, it can be pressed by rotating the screw, thereby achieving the effect of fixing the aluminum alloy thin-walled part 2, so that the aluminum alloy thin-walled part 2 is horizontally fixed on the bottom plate 30, and at the same time, the support blocks 31 fixed at both ends can achieve the effect of limiting the deformation of the workpiece; At the same time, based on the above aging fixture 3, the process steps of aging treatment are as follows: The first step is to clamp the aluminum alloy thin-walled part 2 through the aging fixture 3 as required to ensure that the aluminum alloy thin-walled part 2 is stable and in the correct position; The second step is to heat the empty furnace to 160° before starting the aging treatment, keep it for 3 minutes, open the furnace door, and push the aluminum alloy thin-walled part 2 into the furnace, moving as slowly as possible to avoid collision; Step 3: Heat at 160° for 3 hours; Step 4: After heating, turn off the power first, then open the furnace door, pull out the aging fixture 3 smoothly, and continue to hang it to air cool to room temperature; The fifth step is to inspect the workpiece after aging treatment to ensure that it meets the relevant requirements; Thus, the internal stress generated during processing can be eliminated through multiple aging treatments, thereby reducing the processing deformation of the aluminum alloy thin-walled part 2 after each process.

[0022] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A process for processing aluminum alloy thin-walled parts, characterized in that: include: In the first step, the aluminum alloy thin-walled part (2) blank is first fixed by suction using a suction cup (1), and the back side of the aluminum alloy thin-walled part (2) is roughly milled, while the front side of the aluminum alloy thin-walled part (2) is roughly milled in sections, and parts that cooperate with the positioning holes (13) are reserved around the aluminum alloy thin-walled part (2); The second step is to place the processed aluminum alloy thin-walled part (2) into an aging fixture (3) for aging treatment; In the third step, after the aging treatment, the back side of the aluminum alloy thin-walled part (2) is semi-finished milled, and at the same time, the front side of the aluminum alloy thin-walled part (2) is semi-finished milled in sections; Step 4: Place the semi-finished aluminum alloy thin-walled part (2) into the aging fixture (3) again for aging treatment. The aging treatment conditions are the same as the first time. Step 5: After the aging treatment, the back side of the aluminum alloy thin-walled part (2) is fine-milled to achieve the desired size. At the same time, the front side of the aluminum alloy thin-walled part (2) is fine-milled in sections to achieve the desired size. Step 6: Perform bench work on the processed aluminum alloy thin-walled part (2), remove burrs, polish and clean it; Step seven: inspection and storage.

2. The aluminum alloy thin-walled parts processing technology according to claim 1 is characterized in that: The suction cup (1) in the first step comprises a base (10), one end of the base (10) is provided with a plurality of air guide grooves (15), the ends of the air guide grooves (15) are each provided with an air guide hole (14), and the air guide hole (14) passes through the base (10) and extends to one side of the base (10).

3. The aluminum alloy thin-walled parts processing technology according to claim 2 is characterized in that: The base (10) is provided with a positioning hole (13).

4. The aluminum alloy thin-walled parts processing technology according to claim 2 is characterized in that: One end of the base (10) is provided with a plurality of installation grooves (12) at a position close to the air guide groove (15), and a sealing gasket is provided in the installation groove (12).

5. The aluminum alloy thin-walled parts processing technology according to claim 1 is characterized in that: The regional segmentation processing in the first step, the third step and the fifth step is specifically to cut in sequence according to different regional divisions.

6. The aluminum alloy thin-walled parts processing technology according to claim 1 is characterized in that: The back surface processing of the aluminum alloy thin-walled part (2) in the first step has a processing allowance of 2 mm, and the front area segment processing of the aluminum alloy thin-walled part (2) in the first step has a processing allowance of 2 mm.

7. The aluminum alloy thin-walled parts processing technology according to claim 1 is characterized by: The back surface processing of the aluminum alloy thin-walled part (2) in the third step has a processing allowance of 0.5 mm, and the front area segment processing of the aluminum alloy thin-walled part (2) in the third step has a processing allowance of 0.5 mm.

8. The aluminum alloy thin-walled parts processing technology according to claim 1 is characterized by: The aging fixture (3) of the second step comprises a base plate (30), the base plate (30) is provided with a plurality of mounting cavities (32), a sliding block (38) is slidably arranged in the mounting cavity (32), the sliding block (38) is provided with a slide groove (36), a positioning bolt (34) is arranged inside the slide groove (36), the positioning bolt (34) passes through the slide groove (36) and is threadedly connected to the base plate (30), a concave block (33) is fixedly arranged on one side of the sliding block (38), a locking bolt (35) is threadedly connected to one side of the concave block (33), and a supporting block (31) is fixedly arranged at both ends of the base plate (30) between the mounting cavities (32) on both sides, and a screw is threadedly arranged on one group of the supporting blocks (31).

9. The aluminum alloy thin-walled parts processing technology according to claim 1 is characterized by: The process steps of aging treatment in the second step and the fourth step are as follows: The first step is to clamp the aluminum alloy thin-walled part (2) through the aging fixture (3) as required to ensure that the aluminum alloy thin-walled part (2) is stable and correctly positioned; The second step is to heat the empty furnace to 160° before starting the aging treatment, keep it for 3 minutes, open the furnace door, and push the aluminum alloy thin-walled part (2) into the furnace, moving as slowly as possible to avoid collision; Step 3: Heat at 160° for 3 hours; Step 4: After heating is completed, turn off the power first, then open the furnace door, pull out the aging fixture (3) smoothly, and continue to hang it in the air to cool it to room temperature; The fifth step is to inspect the workpiece after aging treatment to ensure that it meets the relevant requirements.

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