Forming method of deep-cylinder bottomed medium-large aluminum alloy forge piece with flange plate

Abstract

The invention discloses a forming method for a deep-cylinder bottomed medium-large aluminum alloy forge piece with a flange plate. The forming method comprises the following steps that S1, a cylindrical aluminum forge piece raw material is prepared; s2, turning and milling equipment is used for turning and milling the outer wall of the cylindrical aluminum forge piece raw material, an aluminum alloy forge piece primary product is obtained, and the aluminum alloy forge piece primary product comprises a straight barrel body, a cone frustum section and a flange plate; s3, a ring binding machine is used for conducting trepanning on the primary aluminum alloy forge piece product, and a semi-finished aluminum alloy forge piece product is obtained; and S4, a forging punching machine is used for punching the aluminum alloy forge piece semi-finished product, so that a first center hole is formed in the straight cylinder body, and the deep cylinder bottomed medium-large aluminum alloy forge piece finished product with the flange plate is obtained. According to the forming method of the deep-cylinder bottomed medium-large aluminum alloy forge piece with the flange plate, the problem that in the prior art, a first center hole and a second center hole in a deep-cylinder bottomed medium-large aluminum alloy forge piece product with the flange plate cannot be machined is solved.

Description

Technical Field

[0001] The invention relates to the field of aluminum alloy forging production, and in particular to a forming method for a medium-to-large aluminum alloy forging with a deep cylinder and a bottom and a flange. Background Art

[0002] like Figure 1 as well as Figure 2 As shown, the medium-to-large aluminum alloy forging with a deep cylinder and a bottom and a flange includes: a straight cylinder body, a frustum section and a flange. The straight cylinder body is a hollow cylindrical structure. The small end of the frustum section is connected to one end of the straight cylinder body. The outer diameter of the end face of the small end of the frustum section is equal to the outer diameter of the straight cylinder body. The large end of the frustum section is connected to the flange. The outer diameter of the end face of the large end of the frustum section is equal to the outer diameter of the flange. A first center hole is opened in the straight cylinder body. A second center hole is opened in the flange and the frustum section. The axis of the first center hole is in a straight line with the axis of the second center hole. The diameter of the first center hole is larger than the diameter of the second center hole.

[0003] Then how to open the first center hole and the second center hole on the aluminum alloy forging is the topic discussed in this application. The hole opening equipment used in the prior art includes a ring-binding machine and a forging punching machine.

[0004] The ring binding machine includes: a reaming knife, a rotating drive device, a lifting seat, a lifting drive device and a frame. The lifting drive device is installed on the frame, and the output end of the lifting drive device is connected to the lifting seat. The rotating drive device is installed on the lifting seat, and the output end of the rotating drive device is connected to the reaming knife, thereby realizing continuous driving of the reaming knife to rotate and continuous advancement of the reaming knife, thereby realizing mechanical turning of holes. However, since the first center hole in the medium and large aluminum alloy forgings with deep barrels and bottoms with flanges is deep, the reaming knife cannot be set very long, and it is easy to break if it is too long, and the first center hole cannot be processed.

[0005] The forging punching machine includes: a forging frame, a forging punching drive device, a punching head and a punching die. The forging punching drive device is fixed on the forging frame, and the output end of the forging punching drive device is connected to the punching head. A punching station is arranged directly below the punching head. The punching station is used to place the punching die, and the punching die is used to position the material to be processed. When punching, the forging punching drive device continuously punches the material to be processed, so that the material at the center moves to both sides, and then the material to be processed finally extends upward to form a hollow cylindrical structure. Although a deeper first center hole can be processed, it is not possible to punch medium and large aluminum alloy forgings with deep barrels and bottoms with flanges, because the flange and the outer wall of the straight barrel body are not a cylindrical structure, but a special-shaped structure, and it is impossible to obtain the medium and large aluminum alloy forgings with deep barrels and bottoms with flanges after punching. Summary of the invention

[0006] The present invention aims to provide a forming method for medium-to-large aluminum alloy forgings with a deep cylinder and a bottom and a flange, so as to solve the problem that the first center hole and the second center hole in the medium-to-large aluminum alloy forgings with a deep cylinder and a bottom and a flange cannot be processed in the prior art.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

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

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

[0010] S2. Use milling equipment to mill the outer wall of the cylindrical aluminum forging raw material to obtain a primary aluminum alloy forging. The primary aluminum alloy forging includes: a straight cylinder body, a truncated cone section and a flange. The straight cylinder body is a hollow cylindrical structure. The small end of the truncated cone section is connected to one end of the straight cylinder 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 cylinder 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, using a ring-binding machine to drill holes in the aluminum alloy forging product, so that a second center hole is drilled at the flange and the conical section of the aluminum alloy forging product, to obtain a semi-finished aluminum alloy forging product;

[0012] S4, using a forging punching machine to punch the semi-finished aluminum alloy forging, so that the straight cylinder body has a first center hole, and a deep cylinder with a bottom and a medium-to-large aluminum alloy forging finished product with a flange is obtained;

[0013] The forging punching machine comprises: a forging frame, a forging punching drive device, a punching head and a punching die. The forging punching drive device is fixed on the forging frame, the output end of the forging punching drive device is connected to the punching head, a punching station is arranged directly below the punching head, and the punching station is used to place the punching die; the punching die comprises: a die base, a filling head, a cover ring and a positioning ring, the die base is used to be placed in the punching station, the die base supports the end surface of the flange in the semi-finished aluminum alloy forging away from the frustum section, a filling head is protruding from the die base, the filling head is used to fill the second center hole opened at the flange and the frustum section in the semi-finished aluminum alloy forging, a cover ring is covered on the die base, the cover ring covers the flange and the frustum section in the semi-finished aluminum alloy forging, a positioning ring extending upward is fixed to the cover ring, the positioning ring surrounds the straight cylinder body in the semi-finished aluminum alloy forging, and the cover ring is detachably connected to the die base through a connecting mechanism.

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

[0015] S41, placing the aluminum alloy forging semi-finished product on the mold base, wherein the mold base supports the flange end face of the aluminum alloy forging semi-finished product, and 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, placing a cover ring connected to the positioning ring on the die base, the cover ring covering the frustum section and the flange in the semi-finished aluminum alloy forging, and the positioning ring surrounding the straight cylinder body in the semi-finished aluminum alloy forging;

[0017] S43, connecting the cover ring to the mold base using a connecting mechanism;

[0018] S44, start the forging punching driving device, and use the punching head to punch the straight cylinder body in the semi-finished aluminum alloy forging, so that a first center hole is formed on the straight cylinder body, thereby obtaining a medium-to-large aluminum alloy forging product with a deep cylinder and a bottom and a 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 through a hinge shaft, a notch is formed on the edge of the cover ring, the notch is for the connecting screw to be screwed into, and the other end of the connecting screw is threadedly connected to the clamping nut, which presses the cover ring onto the mold base.

[0020] Preferably, hanging ears are 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 ear to hang the cover ring and the positioning ring on the mold base and then buckle the cover ring on the mold base.

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

[0023] In the present application, a ring-binding machine and a forging punching machine are used in combination. First, a turning and milling device is used to process a preliminary aluminum alloy forging with a frustum section and a flange section at the end, so that the appearance is the shape required for the finished product; then, a ring-binding machine is used to process a second center hole that is not very deep in the frustum section and the flange section; finally, a forging punching machine is used to punch out a deeper second center hole. In this step, a separate punching die with a die base, a filling head, a cover ring and a positioning ring is used, so 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 frustum section. A shaping cavity is formed between the cover ring and the mold base, and the shaping cavity matches the flange with the second center hole and the frustum segment. In this way, when punching, the extruded material will not flow into the shaping cavity at will, ensuring that the flange with the second center hole and the frustum will not be deformed. In this way, the flange and the frustum with the second center hole are retained in the shaping cavity, and the first center hole is not hindered from being punched 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. During the punching process, the material can only flow upward, thereby finally forming an annular straight cylinder body with the first center hole.

[0024] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a medium to large aluminum alloy forging with a deep cylinder and bottom with a flange.

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

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

[0028] Figure 4 It is a schematic diagram of the structure of a punching die and a medium to large aluminum alloy forging with a deep cylinder and bottom with a flange.

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

[0030] Figure numerals: forging frame 1, forging punching drive device 2, punching head 3, punching die 4, die base 40, filling head 41, cover ring 42, positioning ring 43, connecting mechanism 45, connecting screw 451, tightening nut 452, hinge shaft 453, lifting ear 46, straight cylinder body 51, frustum section 52, flange 53, first center hole 54, second center hole 55. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

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

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

[0034] S2. Use a milling machine to mill the outer wall of the cylindrical aluminum forging raw material to obtain a primary aluminum alloy forging. The primary aluminum alloy forging includes: a straight cylinder body 51, a truncated cone section 52 and a flange 53. The straight cylinder body 51 is a hollow cylindrical structure. The small end of the truncated cone section 52 is connected to one end of the straight cylinder 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 cylinder 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, using a ring-binding machine to drill holes in the aluminum alloy forging product, so that the flange 53 and the conical section of the aluminum alloy forging product are provided with a second center hole 55, thereby obtaining a semi-finished aluminum alloy forging product;

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

[0037] The forging punching machine comprises: a forging frame 1, a forging punching drive device 2, a punching head 3 and a punching die 4. The forging punching drive device 2 is fixed on the forging frame 1, and the output end of the forging punching drive device 2 is connected to the punching head 3. A punching station is arranged directly below the punching head 3, and the punching station is used to place the punching die 4; the punching die 4 comprises: a die base 40, a filling head 41, a cover ring 42 and a positioning ring 43. The die base 40 is used to be placed in the punching station, and the die base 40 supports the flange 53 in the semi-finished aluminum alloy forging away from the circle A filling head 41 is protruded from the end surface of the frustum section 52 on the die base 40, and 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 semi-finished aluminum alloy forging. A cover ring 42 is covered on the die base 40, and the cover ring 42 covers the flange 53 and the frustum section 52 in the semi-finished aluminum alloy forging. A positioning ring 43 extending upward is fixed to the cover ring 42, and the positioning ring 43 surrounds the straight cylinder body 51 in the semi-finished aluminum alloy forging. The cover ring 42 and the die base 40 are detachably connected through a connecting mechanism 45.

[0038] Step S4 includes the following steps:

[0039] S41, placing the aluminum alloy forging semi-finished product on the die base 40, and the die base 40 supports the end surface of the flange 53 in the aluminum alloy forging semi-finished product, and 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, cover the cover ring 42 connected to the positioning ring 43 on the mold base 40, the cover ring 42 covers the truncated cone section 52 and the flange 53 in the semi-finished aluminum alloy forging, and the positioning ring 43 surrounds the straight cylinder body 51 in the semi-finished aluminum alloy forging;

[0041] S43, connecting the cover ring 42 to the mold base 40 using the connecting mechanism 45;

[0042] S44, the forging and punching driving device 2 is started, and the punching head 3 punches the straight cylinder body 51 in the semi-finished aluminum alloy forging, so that a first center hole 54 is formed on the straight cylinder body 51, and a medium-to-large aluminum alloy forging product with a deep cylinder and a bottom and a flange 53 is obtained. The forging and punching driving device 2 punches holes, and the flange 53 and the frustum of the cone are ensured not to be deformed during the punching process between the die base 40 and the cover ring 42.

[0043] The connection mechanism 45 includes: a connection screw 451 and a clamping nut 452. One end of the connection screw 451 is hinged to the mold base 40 through a hinge shaft 453. A notch is formed at the edge of the cover ring 42 for the connection screw 451 to be screwed into. The other end of the connection screw 451 is threadedly connected with a clamping nut 452. The clamping nut 452 clamps the cover ring 42 onto the mold base 40. The mold base 40 and the cover ring 42 are detachably connected.

[0044] A hanging ear 46 is formed on the edge of the cover ring 42 .

[0045] In step S42, the output end of the suspension crane is connected to the suspension ear 46 to suspend the cover ring 42 and the positioning ring 43 on the mold base 40, and then the cover ring 42 is buckled on the mold base 40. The cover ring 42 and the positioning ring 43 are moved above the mold base 40 by suspension, and then the cover ring 42 and the positioning ring 43 are buckled.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for forming a medium-to-large aluminum alloy forging with a deep cylinder and bottom and a flange, characterized in that: The steps include: S1. Prepare the raw materials of cylindrical aluminum forgings; S2. Use milling equipment to mill the outer wall of the cylindrical aluminum forging raw material to obtain a primary aluminum alloy forging. The primary aluminum alloy forging includes: a straight cylinder body, a truncated cone section and a flange. The straight cylinder body is a hollow cylindrical structure. The small end of the truncated cone section is connected to one end of the straight cylinder 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 cylinder 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, using a ring-binding machine to drill holes in the aluminum alloy forging product, so that a second center hole is drilled at the flange and the conical section of the aluminum alloy forging product, to obtain a semi-finished aluminum alloy forging product; S4, using a forging punching machine to punch the semi-finished aluminum alloy forging, so that the straight cylinder body has a first center hole, and a deep cylinder with a bottom and a medium-to-large aluminum alloy forging finished product with a flange is obtained; The forging punching machine comprises: a forging frame, a forging punching drive device, a punching head and a punching die. The forging punching drive device is fixed on the forging frame, the output end of the forging punching drive device is connected to the punching head, a punching station is arranged directly below the punching head, and the punching station is used to place the punching die; the punching die comprises: a die base, a filling head, a cover ring and a positioning ring, the die base is used to be placed in the punching station, the die base supports the end surface of the flange in the semi-finished aluminum alloy forging away from the frustum section, a filling head is protruding from the die base, the filling head is used to fill the second center hole opened at the flange and the frustum section in the semi-finished aluminum alloy forging, a cover ring is covered on the die base, the cover ring covers the flange and the frustum section in the semi-finished aluminum alloy forging, a positioning ring extending upward is fixed to the cover ring, the positioning ring surrounds the straight cylinder body in the semi-finished aluminum alloy forging, and the cover ring is detachably connected to the die base through a connecting mechanism.

2. The forming method of a medium-to-large aluminum alloy forging with a deep cylinder and bottom and flange according to claim 1 is characterized in that: Step S4 includes the following steps: S41, placing the aluminum alloy forging semi-finished product on the mold base, wherein the mold base supports the flange end face of the aluminum alloy forging semi-finished product, and 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, placing a cover ring connected to the positioning ring on the die base, the cover ring covering the frustum section and the flange in the semi-finished aluminum alloy forging, and the positioning ring surrounding the straight cylinder body in the semi-finished aluminum alloy forging; S43, connecting the cover ring to the mold base using a connecting mechanism; S44, start the forging punching driving device, and use the punching head to punch the straight cylinder body in the semi-finished aluminum alloy forging, so that a first center hole is formed on the straight cylinder body, thereby obtaining a medium-to-large aluminum alloy forging product with a deep cylinder and a bottom and a flange.

3. The forming method of a medium-to-large aluminum alloy forging with a deep cylinder and bottom and flange according to claim 2 is 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 through a hinge shaft. A notch is formed on the edge of the cover ring for the connecting screw to be screwed into. The other end of the connecting screw is threadedly connected to the clamping nut, which presses the cover ring onto the mold base.

4. The forming method of a medium-to-large aluminum alloy forging with a deep cylinder and bottom and flange according to claim 3 is characterized in that: A hanging ear is formed on the edge of the cover ring.

5. The forming method of a medium-to-large aluminum alloy forging with a deep cylinder and bottom and flange according to claim 4, characterized in that: In step S42, the output end of the suspension crane is connected to the suspension ear to hang the cover ring and the positioning ring on the mold base and then buckle the cover ring on the mold base.

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