High-cylinder Aluminum Alloy Ring Blanking Device and Blanking Method

Abstract

A high-tube aluminum alloy ring blanking device and method. The device includes a blanking cylindrical die, a long punch, a short punch, a first blanking die, a second blanking die and a blanking punch. The circular aluminum blank is inside the blanking cylindrical die. The long punch and the short punch are pressed into the circular aluminum blank. The first blanking die is at the bottom of the blanking cylindrical die and the circular aluminum blank. The second blanking die is at the bottom of the first blanking die. The blanking punch is at the top of the circular aluminum blank. The method includes S1: placing the circular aluminum blank inside the blanking cylindrical die; S2: pressing the long punch and the short punch into the circular aluminum blank; S3: the blanking cylindrical die and the circular aluminum blank are carried on the first blanking die, and the second blanking die is supported at the bottom of the first blanking die; S4: the long punch and the short punch are withdrawn; S5: the first blanking die is disassembled, and the blanking cylindrical die is carried on the second blanking die; S6: the circular aluminum blank is withdrawn. It has the advantages of simple operation, improved forming efficiency, avoidance of bell mouths, overcoming non-uniformity and surface defects, and being suitable for mass production.

Description

Technical Field

[0001] The present invention mainly relates to the technology of blank making for high cylinder aluminum alloy rings, and particularly relates to a blank making device and a blank making method for high cylinder aluminum alloy rings. Background Art

[0002] The existing forming process for high cylinder aluminum alloy rings is generally: heating → upsetting → punching → mandrel drawing → flat end face → repairing damage → heating → ring rolling. Since the forging temperature range of aluminum alloy is relatively narrow, for some aluminum alloys with a relatively large height-diameter ratio, the blank making before ring rolling often requires two or more heating operations. The problems that are likely to occur during the production process are: 1. The irregular shape of the blank makes it easy to appear a bell mouth during the ring rolling process, and the machining allowance is large; 2. Surface defects are likely to occur in the blank making process, and grinding and repairing damage are required, and the process is cumbersome and too long; 3. The number of forming heating operations is large, which affects the product performance; 4. The deformation of each part of the same product may be inconsistent, resulting in uneven product performance; 5. When mass-producing, the deformation of each product may be inconsistent, resulting in different performances. For some products with a relatively large performance margin, this set of methods does not affect their use, but for some products with strict operating conditions, the consistency of the products needs to be improved. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a high cylinder aluminum alloy ring blank making device and a blank making method that are simple to operate, can improve the forming efficiency, can effectively avoid the bell mouth appearing during the ring rolling process, can overcome the non-uniformity and surface defects, and are suitable for mass production.

[0004] To solve the above technical problem, the present invention adopts the following technical solutions:

[0005] A high cylinder aluminum alloy ring blank making device includes a blank making cylindrical die for placing a circular aluminum blank, a long punch, a short punch, a first blanking die, a second blanking die, and a blanking punch. The circular aluminum blank is placed in the blank making cylindrical die. The long punch and the short punch are respectively pressed into the circular aluminum blank from the centers at both ends of the circular aluminum blank towards the middle. The first blanking die supports the bottom of the blank making cylindrical die and the circular aluminum blank. The second blanking die supports the bottom of the first blanking die. The blanking punch is arranged at the top of the circular aluminum blank.

[0006] As a further improvement of the above technical solution:

[0007] The inner cavity of the blank making cylindrical die, and the outer walls of the long punch and the short punch have a taper.

[0008] The diameter of the small diameter end of the short punch is larger than the diameter of the small diameter end of the long punch, and the diameter of the large diameter end of the short punch is larger than the diameter of the large diameter end of the long punch.

[0009] The large diameter end of the short punch is provided with a straight cylinder section.

[0010] The inner cavity diameter of the first blanking die is larger than the large diameter end diameter of the long punch.

[0011] The inner cavity diameter of the second blanking die is larger than the large diameter end diameter of the inner cavity of the blanking cylinder die.

[0012] The diameter of the blanking punch is smaller than the small diameter end diameter of the inner cavity of the blanking cylinder die.

[0013] A method for blanking a high cylinder aluminum alloy ring is carried out by using the above-mentioned high cylinder aluminum alloy ring blanking device, and includes the following steps:

[0014] S1: Place the circular aluminum blank in the blanking cylinder die, with the small diameter end of the inner cavity of the blanking cylinder die facing downwards;

[0015] S2: Press the long punch and the short punch into the circular aluminum blank from the centers of the upper and lower ends of the circular aluminum blank towards the middle respectively;

[0016] S3: Flip the blanking cylinder die, place the blanking cylinder die and the circular aluminum blank on the first blanking die, and support the second blanking die at the bottom of the first blanking die;

[0017] S4: Press down the short punch until the long punch and the short punch completely exit from the first blanking die;

[0018] S5: Remove the first blanking die, flip the blanking cylinder die and place it on the second blanking die;

[0019] S6: Press down the blanking punch to drive the circular aluminum blank to exit from the second blanking die.

[0020] Compared with the prior art, the advantages of the present invention are as follows:

[0021] The blank-making device for high-barrel aluminum alloy rings of the present invention, when in use, places a circular aluminum blank in the blank-making cylindrical mold, presses a long punch and a short punch into the circular aluminum blank from the centers of the upper and lower ends of the circular aluminum blank towards the middle respectively, flips the blank-making cylindrical mold, places the blank-making cylindrical mold and the circular aluminum blank on the first ejection mold, supports the second ejection mold at the bottom of the first ejection mold, presses down the short punch until the long punch and the short punch completely withdraw from the first ejection mold, disassembles the first ejection mold, flips the blank-making cylindrical mold and places it on the second ejection mold, and finally presses down the ejection punch to drive the circular aluminum blank to withdraw from the second ejection mold. Compared with the traditional structure, this blank-making device forms the inner cavity by using a double-punch two-way pressing method, which has strong operability and high efficiency; during the downward movement of the short punch, the inner cavity will be automatically corrected to a straight cylindrical surface, ensuring the uniformity of the wall thickness of the cylinder part and the perpendicularity of the inner and outer diameters and the end face, and effectively avoiding the bell mouth that appears during the ring rolling process. At the same time, this solution can complete the blank-making of the cylinder part in one heat, and uses the mold to avoid the unevenness and surface defects during forming, with remarkable effects and is suitable for mass production. The high-barrel aluminum alloy ring blank-making method of the present invention is carried out with the above-mentioned high-barrel aluminum alloy ring blank-making device, so it has the corresponding technical effects of the above-mentioned high-barrel aluminum alloy ring blank-making device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. is a schematic structural diagram (opposing punch state) of the high-barrel aluminum alloy ring blank-making device of the present invention.

[0023] Figure 2 FIG. is a schematic structural diagram (punching solid state) of the high-barrel aluminum alloy ring blank-making device of the present invention.

[0024] Figure 3 FIG. is a schematic structural diagram (ejection state) of the high-barrel aluminum alloy ring blank-making device of the present invention.

[0025] Figure 4 FIG. is a schematic structural diagram of the short punch in the high-barrel aluminum alloy ring blank-making device of the present invention.

[0026] Figure 5 FIG. is a schematic structural diagram of the high-barrel aluminum alloy ring after blank-making in the present invention.

[0027] Figure 6 FIG. is a schematic flow chart of the high-barrel aluminum alloy ring blank-making method of the present invention.

[0028] In the figure, each label represents:

[0029] 1. blank-making cylindrical mold; 2. long punch; 3. short punch; 31. straight cylindrical section; 4. first ejection mold; 5. second ejection mold; 6. ejection punch; 7. circular aluminum blank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will further describe the present invention in detail with reference to the accompanying drawings of the specification and specific embodiments.

[0031] Figures 1 to 5 An embodiment of the high-barrel aluminum alloy ring blanking device of the present invention is shown, which includes a blanking cylindrical die 1 for placing a circular aluminum blank 7, a long punch 2, a short punch 3, a first blanking die 4, a second blanking die 5 and a blanking punch 6. The circular aluminum blank 7 is placed inside the blanking cylindrical die 1. The long punch 2 and the short punch 3 are respectively pressed into the circular aluminum blank 7 from the centers at both ends of the circular aluminum blank 7 towards the middle. The first blanking die 4 supports the bottom of the blanking cylindrical die 1 and the circular aluminum blank 7. The second blanking die 5 supports the bottom of the first blanking die 4. The blanking punch 6 is arranged at the top of the circular aluminum blank 7. During use, the circular aluminum blank 7 is placed inside the blanking cylindrical die 1. The long punch 2 and the short punch 3 are respectively pressed into the circular aluminum blank 7 from the centers at the upper and lower ends of the circular aluminum blank 7 towards the middle. The blanking cylindrical die 1 is flipped, and the blanking cylindrical die 1 and the circular aluminum blank 7 are carried on the first blanking die 4. The second blanking die 5 is supported at the bottom of the first blanking die 4. The short punch 3 is pressed down until the long punch 2 and the short punch 3 are completely withdrawn from the first blanking die 4. The first blanking die 4 is disassembled. The blanking cylindrical die 1 is flipped and carried on the second blanking die 5. Finally, the blanking punch 6 is pressed down to drive the circular aluminum blank 7 to withdraw from the second blanking die 5. Compared with the traditional structure, this blanking device forms the inner cavity by using the double-punch two-way pressing method, which has strong operability and high efficiency. During the downward movement of the short punch 3, the inner cavity will be automatically corrected to a straight cylindrical surface, ensuring the uniformity of the wall thickness of the cylindrical part and the perpendicularity of the inner and outer diameters and the end face, and effectively avoiding the bell mouth that appears during the ring rolling process. At the same time, this scheme can realize the blanking of the cylindrical part in one heat. Using the die can avoid the unevenness of forming and surface defects, and the effect is remarkable, which is suitable for mass production.

[0032] In this embodiment, the inner cavity of the blanking cylindrical die 1 and the outer walls of the long punch 2 and the short punch 3 have a taper. The setting of this taper facilitates blanking on the one hand and ensures the uniformity of the wall thickness of the blank on the other hand.

[0033] In this embodiment, the diameter of the small-diameter end of the short punch 3 is larger than the diameter of the small-diameter end of the long punch 2, and the diameter of the large-diameter end of the short punch 3 is larger than the diameter of the large-diameter end of the long punch 2. Such a setting is beneficial to the extrusion of the center punching.

[0034] In this embodiment, a straight cylindrical section 31 is provided at the large-diameter end of the short punch 3. The straight cylindrical section 31 further plays a role in automatically correcting the inner cavity to a straight cylindrical surface during the process, ensuring the uniformity of the wall thickness of the cylindrical part and the perpendicularity of the inner and outer diameters and the end face, and effectively avoiding the bell mouth that appears during the ring rolling process.

[0035] In this embodiment, the inner cavity diameter of the first blanking die 4 is larger than the large-diameter end diameter of the long punch 2. Such a setting facilitates the blanking operation of the long punch 2.

[0036] In this embodiment, the inner cavity diameter of the second blank-removing die 5 is larger than the large-diameter end diameter of the inner cavity of the blank-making cylindrical die 1. Such a setting facilitates the blank-removing operation of the blank-making cylindrical die 1.

[0037] In this embodiment, the diameter of the blank-removing punch 6 is smaller than the small-diameter end diameter of the inner cavity of the blank-making cylindrical die 1. Such a setting facilitates the blank-removing operation of the circular aluminum blank 7.

[0038] Figures 1 to 6 An embodiment of the method for blank-making of high-cylinder aluminum alloy rings according to the present invention is shown, which is carried out by using the above-mentioned blank-making device for high-cylinder aluminum alloy rings, and includes the following steps:

[0039] S1: Place the circular aluminum blank 7 in the blank-making cylindrical die 1, with the small-diameter end of the inner cavity of the blank-making cylindrical die 1 facing downwards;

[0040] S2: Press the long punch 2 and the short punch 3 into the circular aluminum blank 7 from the centers of the upper and lower ends of the circular aluminum blank 7 towards the middle respectively;

[0041] S3: Flip the blank-making cylindrical die 1, place the blank-making cylindrical die 1 and the circular aluminum blank 7 on the first blank-removing die 4, and support the second blank-removing die 5 at the bottom of the first blank-removing die 4;

[0042] S4: Press down the short punch 3 until both the long punch 2 and the short punch 3 completely exit from the first blank-removing die 4;

[0043] S5: Remove the first blank-removing die 4, flip the blank-making cylindrical die 1 and place it on the second blank-removing die 5;

[0044] S6: Press down the blank-removing punch 6 to drive the circular aluminum blank 7 to exit from the second blank-removing die 5.

[0045] This method uses a double-punch two-way pressing method to form the inner cavity, which has strong operability and high efficiency; during the downward movement of the short punch 3, the inner cavity will be automatically corrected to a straight cylindrical surface, ensuring the uniformity of the wall thickness of the cylindrical part and the perpendicularity of the inner and outer diameters and the end faces, and effectively avoiding the bell mouth during the ring rolling process. At the same time, this solution can complete the blank-making of the cylindrical part in one heat, and the mold avoids the unevenness of forming and surface defects, with remarkable effects and is suitable for mass production.

[0046] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the above-disclosed technical content without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of the protection of the technical solution of the present invention.

Claims

1. A method for blanking a high-barrel aluminum alloy ring, characterized in that: It is carried out by using a high-barrel aluminum alloy ring blanking device. The blanking device includes a blanking cylindrical die (1) for placing a circular aluminum blank (7), a long punch (2), a short punch (3), a first ejector die (4), a second ejector die (5) and an ejector punch (6). The circular aluminum blank (7) is placed in the blanking cylindrical die (1). The long punch (2) and the short punch (3) are respectively pressed into the circular aluminum blank (7) from the centers at both ends of the circular aluminum blank (7) towards the middle. The first ejector die (4) is supported at the bottom of the blanking cylindrical die (1) and the circular aluminum blank (7). The second ejector die (5) is supported at the bottom of the first ejector die (4). The ejector punch (6) is arranged at the top of the circular aluminum blank (7). The inner cavity of the blanking cylindrical die (1) and the outer walls of the long punch (2) and the short punch (3) have tapers. The diameter of the small-diameter end of the short punch (3) is larger than that of the small-diameter end of the long punch (2). The diameter of the large-diameter end of the short punch (3) is larger than that of the large-diameter end of the long punch (2). A straight cylinder section (31) is provided at the large-diameter end of the short punch (3). The inner cavity diameter of the first ejector die (4) is larger than the large-diameter end diameter of the long punch (2). The inner cavity diameter of the second ejector die (5) is larger than the large-diameter end diameter of the inner cavity of the blanking cylindrical die (1). The diameter of the ejector punch (6) is smaller than the small-diameter end diameter of the inner cavity of the blanking cylindrical die (1). The blanking method specifically includes the following steps: S1: Place the circular aluminum blank (7) in the blanking cylindrical die (1) with the small-diameter end of the inner cavity of the blanking cylindrical die (1) facing downwards; S2: Press the long punch (2) and the short punch (3) into the circular aluminum blank (7) from the centers of the upper and lower ends of the circular aluminum blank (7) towards the middle respectively; S3: Flip the blanking cylindrical die (1), place the blanking cylindrical die (1) and the circular aluminum blank (7) on the first ejector die (4), and support the second ejector die (5) at the bottom of the first ejector die (4); S4: Press down the short punch (3) until the long punch (2) and the short punch (3) are all withdrawn from the first ejector die (4); S5: Remove the first ejector die (4), flip the blanking cylindrical die (1) and place it on the second ejector die (5); S6: Press down the ejector punch (6) to drive the circular aluminum blank (7) out of the second ejector die (5).

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