A method for forming a large-sized aluminum alloy forging with a flange and a deep cylinder with a bottom

Abstract

The application discloses a forming method of a middle-large aluminum alloy forge piece with a flange and a deep cylinder with a bottom, and comprises the following steps: S1, preparing a cylindrical aluminum forge piece raw material; S2, using a turning and milling device to turn and mill the outer wall of the cylindrical aluminum forge piece raw material to obtain an aluminum alloy forge piece preliminary product, wherein the aluminum alloy forge piece preliminary product comprises a straight cylinder body, a conical platform section and a flange; S3, using a ring crimping machine to punch a hole in the aluminum alloy forge piece preliminary product to obtain an aluminum alloy forge piece semi-finished product; and S4, using a forging puncher to punch a hole in the aluminum alloy forge piece semi-finished product, so that the straight cylinder body is provided with a first center hole, and a middle-large aluminum alloy forge piece with a flange and a deep cylinder with a bottom is obtained. The forming method of the middle-large aluminum alloy forge piece with a flange and a deep cylinder with a bottom solves the problem that the first center hole and the second center hole in the middle-large aluminum alloy forge piece with a flange and a deep cylinder with a bottom cannot be processed in the prior art.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy forging production, specifically to a forming method for medium to large-sized aluminum alloy forgings with flanges and bottoms. Background Technology

[0002] like Figure 1 as well as Figure 2 As shown, the deep cylindrical forging with a flange and bottom comprises: a straight cylindrical body, a truncated cone section, and a flange. The straight cylindrical body is a hollow cylindrical structure. The small end of the truncated cone section is connected to one end of the straight cylindrical body, and the outer diameter of the end face of the small end of the truncated cone section is equal to the outer diameter of the straight cylindrical body. The large end of the truncated cone section is connected to the flange, and the outer diameter of the end face of the large end of the truncated cone section is equal to the outer diameter of the flange. A first central hole is provided in the straight cylindrical body, and a second central hole is provided in the flange and the truncated cone section. The axis of the first central hole and the axis of the second central hole are on a straight line, and the diameter of the first central hole is larger than the diameter of the second central hole.

[0003] How to open the first center hole and the second center hole on the aluminum alloy forging is the topic of discussion in this application. The hole-opening equipment used in the prior art includes ring-binding machines and forging punching machines.

[0004] The ring-forming machine includes: a reamer, a rotary drive, a lifting seat, a lifting drive, and a frame. The lifting drive is mounted on the frame, and its output is connected to the lifting seat. The rotary drive is mounted on the lifting seat, and its output is connected to the reamer. This allows for continuous rotation and advancement of the reamer, thus achieving mechanical turning of the hole. However, because the first center hole in large and medium-sized aluminum alloy forgings with flanges and bottoms is relatively deep, the reamer cannot be set to be very long, as a long reamer is prone to breakage and cannot be machined to produce the first center hole.

[0005] The forging and punching machine includes: a forging frame, a forging and stamping drive device, a punching head, and a punching die. The forging and stamping drive device is fixed on the forging frame, and its output end is connected to the punching head. A punching station is set directly below the punching head, where the punching die is placed. The punching die is used to position the material to be processed. During punching, the forging and stamping drive device continuously punches the material to be processed, causing the material at the center to move to both sides, and then causing the material to be processed to eventually extend upward to form a hollow cylindrical structure. Although it can process relatively deep first center holes, it cannot punch deep cylindrical bottom medium and large aluminum alloy forgings with flanges because the flange and the outer wall of the straight cylinder body are not cylindrical structures, but irregular structures. It is not possible to obtain a deep cylindrical bottom medium and large aluminum alloy forging product with flanges after punching. Summary of the Invention

[0006] This invention provides a forming method for medium and large-sized aluminum alloy forgings with flanges and bottoms, solving the problem in the prior art that the first and second center holes in medium and large-sized aluminum alloy forgings with flanges and bottoms cannot be processed.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This invention discloses a method for forming a medium-to-large-sized aluminum alloy forging with a flange and bottom, comprising the following steps:

[0009] S1. Prepare the raw materials for cylindrical aluminum forgings;

[0010] S2. The outer wall of the cylindrical aluminum forging raw material is milled using a milling machine to obtain a preliminary aluminum alloy forging. The preliminary aluminum alloy forging includes: a straight cylindrical body, a truncated cone section, and a flange. The straight cylindrical body is a hollow cylindrical structure. The small end of the truncated cone section is connected to one end of the straight cylindrical body. The outer diameter of the end face of the small end of the truncated cone section is equal to the outer diameter of the straight cylindrical body. The large end of the truncated cone section is connected to the flange. The outer diameter of the end face of the large end of the truncated cone section is equal to the outer diameter of the flange.

[0011] S3. Use a ring-binding machine to open holes in the initial aluminum alloy forging, so that the flange and conical section of the initial aluminum alloy forging have second center holes, and obtain the semi-finished aluminum alloy forging.

[0012] S4. Use a forging punching machine to punch holes in the aluminum alloy forging semi-finished product, so that the straight cylinder body has a first center hole, and obtain a deep cylinder with a bottom medium and large aluminum alloy forging finished product with flange.

[0013] The forging and punching machine includes: a forging frame, a forging and stamping drive device, a punching head, and a punching die. The forging and stamping drive device is fixed on the forging frame, and its output end is connected to the punching head. A punching station is provided directly below the punching head, and the punching station is used to place the punching die. The punching die includes: a die base, a filling head, a cover ring, and a positioning ring. The die base is used to place the die at the punching station and supports the end face of the flange in the aluminum alloy forging semi-finished product away from the truncated cone section. A filling head protrudes from the die base and is used to fill the second center hole opened at the flange and truncated cone section in the aluminum alloy forging semi-finished product. A cover ring is placed on the die base, covering the flange and truncated cone section in the aluminum alloy forging semi-finished product. An upwardly extending positioning ring is fixed to the cover ring, which surrounds the straight cylindrical body in the aluminum alloy forging semi-finished product. The cover ring and the die base are detachably connected by a connecting mechanism.

[0014] Preferably, step S4 includes the following steps:

[0015] S41. Place the aluminum alloy forging semi-finished product on the mold base, and the mold base supports the flange end face of the aluminum alloy forging semi-finished product. The filling head extends into the second center hole of the aluminum alloy forging semi-finished product, and the inner wall of the second center hole is supported by the filling head.

[0016] S42. Place the cover ring connected to the positioning ring on the mold base. The cover ring covers the outside of the truncated cone section and the flange in the aluminum alloy forging semi-finished product, while the positioning ring surrounds the straight cylinder body in the aluminum alloy forging semi-finished product.

[0017] S43. Use a connecting mechanism to connect the cover ring to the mold base;

[0018] S44. Start the forging and stamping drive device. The punching head punches the straight cylinder body in the aluminum alloy forging semi-finished product, so that there is a first center hole on the straight cylinder body, and obtain a deep cylinder with bottom medium and large aluminum alloy forging product with flange.

[0019] Preferably, the connecting mechanism includes a connecting screw and a clamping nut. One end of the connecting screw is hinged to the mold base via a hinge shaft. A notch is formed on the edge of the cover ring for the connecting screw to screw into. The other end of the connecting screw is threaded with a clamping nut, which presses the cover ring onto the mold base.

[0020] Preferably, a suspension lug is formed on the edge of the cover ring.

[0021] Preferably, in step S42, the output end of the suspension crane is connected to the suspension lug to suspend the cover ring and the positioning ring on the mold base and then fasten the cover ring on the mold base.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In this application, a ring-binding machine and a forging punching machine are used in conjunction. First, a preliminary aluminum alloy forging with a truncated cone section and a flange section at the end is machined using a milling machine to ensure that the shape is as required for the finished product. Then, a ring-binding machine is used to machine a relatively shallow second center hole within the truncated cone section and the flange section. Finally, a deeper second center hole is punched using a forging punching machine. In this step, a separate punching die with a die base, a filling head, a cover ring, and a positioning ring is used. This ensures that the die base supports the flange, the filling head fully fills the second center hole, and the cover ring covers the flange and the truncated cone section. The cover ring and the mold base form a shaping cavity, which matches the flange and the truncated cone section with the second center hole. This prevents the material from flowing randomly into the shaping cavity during the punching process, ensuring that the flange and the truncated cone with the second center hole do not deform. This preserves the irregularly shaped flange and the truncated cone with the second center hole in the shaping cavity, without hindering the punching of the first center hole in the center of the straight cylinder body. The outer wall of the positioning ring is in close contact with the outer wall of the straight cylinder body, and the material can only flow upward during the punching process, thus ultimately forming a ring-shaped straight cylinder body with the first center hole.

[0024] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of a large-sized aluminum alloy forging with a flange and bottom.

[0026] Figure 2 This is a cross-sectional view of a medium-to-large-sized aluminum alloy forging with a flange and bottom.

[0027] Figure 3 This is a schematic diagram of a forging punching machine.

[0028] Figure 4 This is a structural schematic diagram of a punching die and a deep cylindrical bottom medium-to-large aluminum alloy forging with a flange.

[0029] Figure 5 This is a cross-sectional view of a punching die and a deep-cylinder, bottom-mounted, medium-to-large-sized aluminum alloy forging with a flange.

[0030] Reference numerals: 1. Forging frame; 2. Forging and stamping drive device; 3. Punching head; 4. Punching die; 40. Die base; 41. Filling head; 42. Cover ring; 43. Positioning ring; 45. Connecting mechanism; 451. Connecting screw; 452. Clamping nut; 453. Hinge shaft; 46. Lifting lug; 51. Straight cylinder body; 52. Frustum section; 53. Flange; 54. First center hole; 55. Second center hole. Detailed Implementation

[0031] To make the technical means, creative features, objectives, and effects of this invention clearer and easier to understand, the invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0032] like Figures 1 to 5 As shown, this invention discloses a forming method for a medium-to-large-sized aluminum alloy forging with a flange 53 and a bottom, comprising the following steps:

[0033] S1. Prepare the raw materials for cylindrical aluminum forgings;

[0034] S2. The outer wall of the cylindrical aluminum forging raw material is milled using a milling machine to obtain a preliminary aluminum alloy forging. The preliminary aluminum alloy forging includes: a straight cylindrical body 51, a truncated cone section 52, and a flange 53. The straight cylindrical body 51 is a hollow cylindrical structure. The small end of the truncated cone section 52 is connected to one end of the straight cylindrical body 51. The outer diameter of the end face of the small end of the truncated cone section 52 is equal to the outer diameter of the straight cylindrical body 51. The large end of the truncated cone section 52 is connected to the flange 53. The outer diameter of the end face of the large end of the truncated cone section 52 is equal to the outer diameter of the flange 53.

[0035] S3. Use a ring-binding machine to open holes in the initial aluminum alloy forging, so that the flange 53 and the conical section of the initial aluminum alloy forging have second center holes 55, and obtain the semi-finished aluminum alloy forging.

[0036] S4. Use a forging punching machine to punch holes in the aluminum alloy forging semi-finished product, so that the straight cylinder body 51 has a first center hole 54, and obtain a deep cylinder bottom medium and large aluminum alloy forging finished product with flange 53.

[0037] The forging and punching machine includes: a forging frame 1, a forging and stamping drive device 2, a punching head 3, and a punching die 4. The forging and stamping drive device 2 is fixed on the forging frame 1, and the output end of the forging and stamping drive device 2 is connected to the punching head 3. A punching station is provided directly below the punching head 3 for placing the punching die 4. The punching die 4 includes: a die base 40, a filling head 41, a cover ring 42, and a positioning ring 43. The die base 40 is placed in the punching station and supports the flange 53 of the aluminum alloy forging semi-finished product away from the circle. A filling head 41 protrudes from the end face of the frustum section 52 and the mold base 40. The filling head 41 is used to fill the second center hole 55 opened at the flange 53 and the frustum section 52 in the aluminum alloy forging semi-finished product. A cover ring 42 is covered on the mold base 40. The cover ring 42 covers the flange 53 and the frustum section 52 in the aluminum alloy forging semi-finished product. The cover ring 42 is fixed with an upwardly extending positioning ring 43. The positioning ring 43 surrounds the straight cylindrical body 51 in the aluminum alloy forging semi-finished product. The cover ring 42 and the mold base 40 are detachably connected by a connecting mechanism 45.

[0038] Step S4 includes the following steps:

[0039] S41. Place the aluminum alloy forging semi-finished product on the mold base 40, and the mold base 40 supports the end face of the flange 53 in the aluminum alloy forging semi-finished product. The filling head 41 extends into the second center hole 55 in the aluminum alloy forging semi-finished product, and the inner wall of the second center hole 55 is supported by the filling head 41.

[0040] S42. Place the cover ring 42 connected to the positioning ring 43 on the mold base 40. The cover ring 42 covers the outside of the cone section 52 and the flange 53 in the aluminum alloy forging semi-finished product. At the same time, the positioning ring 43 surrounds the outside of the straight body 51 in the aluminum alloy forging semi-finished product.

[0041] S43. Use the connecting mechanism 45 to connect the cover ring 42 to the mold base 40;

[0042] S44. Start the forging and stamping drive device 2. The punching head 3 punches a hole in the straight cylindrical body 51 of the aluminum alloy forging semi-finished product, so that the straight cylindrical body 51 has a first center hole 54, resulting in a deep cylindrical medium-to-large aluminum alloy forging product with a flange 53. The forging and stamping drive device 2 realizes the punching, and the die base 40 and the cover ring 42 ensure that the flange 53 and the truncated cone will not deform during the punching process.

[0043] The connecting mechanism 45 includes a connecting screw 451 and a clamping nut 452. One end of the connecting screw 451 is hinged to the mold base 40 via a hinge shaft 453. A notch is formed on the edge of the cover ring 42 for the connecting screw 451 to screw into. The other end of the connecting screw 451 is threaded with the clamping nut 452, which presses the cover ring 42 onto the mold base 40. This achieves a detachable connection between the mold base 40 and the cover ring 42.

[0044] A suspension lug 46 is formed on the edge of the cover ring 42.

[0045] In step S42, the output end of the overhead crane is connected to the suspension lug 46 to suspend the cover ring 42 and the positioning ring 43 on the mold base 40, and then the cover ring 42 is fastened to the mold base 40. This achieves the purpose of moving the cover ring 42 and the positioning ring 43 above the mold base 40 by suspension, and then fastening the cover ring 42 and the positioning ring 43.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for forming a medium-to-large-sized aluminum alloy forging with a flange and bottom, characterized in that, Includes the following steps: S1. Prepare the raw materials for cylindrical aluminum forgings; S2. The outer wall of the cylindrical aluminum forging raw material is milled using a milling machine to obtain a preliminary aluminum alloy forging. The preliminary aluminum alloy forging includes: a straight cylindrical body, a truncated cone section, and a flange. The straight cylindrical body is a hollow cylindrical structure. The small end of the truncated cone section is connected to one end of the straight cylindrical body. The outer diameter of the end face of the small end of the truncated cone section is equal to the outer diameter of the straight cylindrical body. The large end of the truncated cone section is connected to the flange. The outer diameter of the end face of the large end of the truncated cone section is equal to the outer diameter of the flange. S3. Use a ring-binding machine to open holes in the initial aluminum alloy forging, so that the flange and conical section of the initial aluminum alloy forging have second center holes, and obtain the semi-finished aluminum alloy forging. S4. Use a forging punching machine to punch holes in the aluminum alloy forging semi-finished product, so that the straight cylinder body has a first center hole, and obtain a deep cylinder with a bottom medium and large aluminum alloy forging finished product with flange. The forging and punching machine includes: a forging frame, a forging and stamping drive device, a punching head, and a punching die. The forging and stamping drive device is fixed on the forging frame, and its output end is connected to the punching head. A punching station is provided directly below the punching head, and the punching station is used to place the punching die. The punching die includes: a die base, a filling head, a cover ring, and a positioning ring. The die base is used to place the die at the punching station and supports the end face of the flange in the aluminum alloy forging semi-finished product away from the truncated cone section. A filling head protrudes from the die base and is used to fill the second center hole opened at the flange and truncated cone section in the aluminum alloy forging semi-finished product. A cover ring is placed on the die base, covering the flange and truncated cone section in the aluminum alloy forging semi-finished product. An upwardly extending positioning ring is fixed to the cover ring, which surrounds the straight cylindrical body in the aluminum alloy forging semi-finished product. The cover ring and the die base are detachably connected by a connecting mechanism.

2. The forming method of a deep cylindrical medium-to-large aluminum alloy forging with flange and bottom according to claim 1, characterized in that, Step S4 includes the following steps: S41. Place the aluminum alloy forging semi-finished product on the mold base, and the mold base supports the flange end face of the aluminum alloy forging semi-finished product. The filling head extends into the second center hole of the aluminum alloy forging semi-finished product, and the inner wall of the second center hole is supported by the filling head. S42. Place the cover ring connected to the positioning ring on the mold base. The cover ring covers the outside of the truncated cone section and the flange in the aluminum alloy forging semi-finished product, while the positioning ring surrounds the straight cylinder body in the aluminum alloy forging semi-finished product. S43. Use a connecting mechanism to connect the cover ring to the mold base; S44. Start the forging and stamping drive device. The punching head punches the straight cylinder body in the aluminum alloy forging semi-finished product, so that there is a first center hole on the straight cylinder body, and obtain a deep cylinder with bottom medium and large aluminum alloy forging product with flange.

3. The forming method of a deep cylindrical medium-to-large aluminum alloy forging with flange and bottom according to claim 2, characterized in that, The connecting mechanism includes a connecting screw and a clamping nut. One end of the connecting screw is hinged to the mold base via a hinge shaft. A notch is formed on the edge of the cover ring for the connecting screw to screw into. The other end of the connecting screw is threaded with a clamping nut, which presses the cover ring onto the mold base.

4. The forming method of a deep cylindrical medium-to-large aluminum alloy forging with flange and bottom according to claim 3, characterized in that, Suspension lugs are formed on the edge of the cover ring.

5. A method for forming a medium-to-large-sized deep-cylinder aluminum alloy forging with a flange and bottom according to claim 4, characterized in that, In step S42, the output end of the suspension crane is connected to the suspension lug to suspend the cover ring and the positioning ring on the mold base and then fasten the cover ring on the mold base.

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