Mold convenient for aluminum alloy forging demolding

Abstract

The utility model discloses a die convenient for aluminum alloy forging demolding, which comprises a female die and a male die which are arranged oppositely, a die cavity is formed in the female die, and the male die is matched with the die cavity in a concave-convex manner and moves along the die assembly direction; at least two material blocking and demolding assemblies are evenly distributed at the lower end of the female die in the circumferential direction, each material blocking and demolding assembly comprises a forge piece blocking part, and the forge piece blocking parts are removably arranged on the side, facing the male die, of an opening of the die cavity in a blocking mode. The male die is integrally formed and comprises a die head and an ejector rod connected with the die head. The circumferential side face of the die head and the circumferential side face of the ejector rod are in smooth transition, the circumferential side face of the die head is an arc face, and the diameter of the cross section of the ejector rod is smaller than the maximum diameter of the cross section of the die head. The die is more stable in structure and convenient to operate, and demolding among the male die, the female die and the forge piece is simpler and quicker.

Description

Technical Field

[0001] The utility model relates to the technical field of reverse extrusion dies, in particular to a die which is convenient for aluminum alloy forging demoulding. Background Art

[0002] Extrusion technology is a highly efficient, high-quality, low-consumption, little / no cutting processing technology. In terms of extrusion methods, reverse extrusion has lower extrusion force and higher yield rate compared to forward extrusion.

[0003] Existing aluminum alloy and other metal extrusions are processed and formed by reverse extrusion dies. Extruded aluminum alloy profiles have good characteristics such as light weight, high strength, good processing performance, and corrosion resistance. However, the aluminum alloy extruded by reverse extrusion dies has the problem of difficult and cumbersome demoulding operation.

[0004] CN203917449U discloses a reverse extrusion die for a metal cylindrical part, which includes a mandrel, a mandrel end, an extrusion barrel and a baffle, wherein the mandrel and the mandrel end form a male die, and the extrusion barrel and the baffle form a female die, so as to realize reverse extrusion forming of the metal cylindrical part. However, the mold design does not consider the demoulding problem of the metal part.

[0005] CN107186148A discloses a die for forging a rotary drum on a common hydraulic press, comprising an upper die punch, a lower die sleeve and a lower die core, wherein the lower die core is fixedly inserted at the inner side of the lower end of the lower die sleeve, and the upper die punch can be inserted into the lower die sleeve; a through hole is provided on the lower die core, and a push rod is inserted into the through hole, and the demoulding of the product is achieved by the push rod. The above die structure only considers the demoulding of the lower die sleeve and the forged product, and does not consider the demoulding problem of the upper die punch and the forged product. Utility Model Content

[0006] The utility model aims to overcome the defects in the prior art and provide a die for facilitating demoulding of aluminum alloy forging, which has a more stable structure, is convenient to operate, and makes demoulding between the punch, the die and the forging simpler and faster.

[0007] In order to achieve the above technical effects, the technical solution of the utility model is: a mold for facilitating demoulding of aluminum alloy forging, comprising a concave mold and a convex mold arranged opposite to each other, a mold cavity is formed in the concave mold, and the convex mold is matched with the mold cavity and moves along the mold closing direction;

[0008] At least two material blocking and demoulding components are evenly distributed circumferentially at the lower end of the female die, and the material blocking and demoulding components include a forging blocking portion, and the forging blocking portion is removably disposed on a side of the die cavity opening facing the male die;

[0009] The punch is integrally formed and includes a die head and a push rod connected to the die head; the circumferential side surfaces of the die head and the push rod have a smooth transition, the circumferential side surfaces of the die head are arc surfaces, and the cross-sectional diameter of the push rod is smaller than the maximum cross-sectional diameter of the die head.

[0010] The preferred technical solution is to include a lower pad, the upper surface of which is fixedly connected to a limiting piece, the die is arranged on the upper surface of the lower pad and is clamped in the limiting area enclosed by the limiting piece; the material blocking demoulding assembly is detachably connected to the limiting piece.

[0011] A preferred technical solution is that the material blocking demoulding assembly includes two side arms and a forging blocking portion; one end of the side arm is connected to the forging blocking portion, and the other end is connected to the limiter through a rotating shaft.

[0012] The preferred technical solution is to include a positioning connector, both ends of the lower cushion block are detachably connected to the positioning connector, a lower pressure block is sandwiched between the two positioning connectors, and the positioning connector is detachably connected to the base surface.

[0013] The preferred technical solution is to include an upper pressing block and an upper cushion block, wherein the upper cushion block is connected to the upper pressing block and the punch.

[0014] A preferred technical solution is that a female mold blocking portion is further provided on the material blocking demoulding assembly, and the female mold blocking portion is removably disposed on a side of the female mold facing the male mold.

[0015] A preferred technical solution is that one of the two side arm parts is rotatably connected to one end of the die blocking part through a rotating shaft, and the other is provided with a limiting groove for accommodating the other end of the die blocking part, and the limiting groove has a first limiting part that is blocked on the die blocking part and away from the die.

[0016] The advantages and beneficial effects of the utility model are:

[0017] The utility model is provided with more than two material blocking demoulding components which are evenly distributed on the circumferential edge of the lower end of the die, and exerts a downward pressure on the forging in a dispersed manner. The circumferential force distribution on the top surface of the forging is even, and demoulding of the punch and the forging is smoother.

[0018] The structural design of the punch head and the ejector pin reduces the contact area between the punch and the forging. At the same time, due to the self-weight of the forging, it is more conducive to the separation of the punch and the forging. The upward lifting force of the forging on the demoulding component is smaller, and the demoulding component has a stable structure and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the three-dimensional structure of the mold of the embodiment;

[0020] Figure 2 yes Figure 1 Front view of the mold;

[0021] Figure 3 is a schematic diagram of the three-dimensional structure of a mold in another embodiment;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the punch;

[0023] Figure 5 It is a three-dimensional structural schematic diagram of a mold with a concave mold blocking part;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of a material blocking and demoulding assembly with a concave mold blocking portion;

[0025] In the figure: 10, die; 101, die cavity;

[0026] 20, punch; 201, die head; 202, ejector pin;

[0027] 30. Material blocking and demoulding assembly; 301. Forging blocking portion; 302. Side arm portion; 303. Concave die blocking portion;

[0028] 40. Lower pad; 41. Upper pad;

[0029] 50. Limiting member; 501. Limiting area;

[0030] 60. Positioning connector;

[0031] 70, lower pressure block; 71, upper pressure block;

[0032] 80. Forgings;

[0033] 90. Limiting groove; 901. First limiting portion. DETAILED DESCRIPTION

[0034] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise specified, “plurality” means more than two; the terms “upper”, “lower”, “left”, “right”, “inside”, “outside”, etc., indicating directions or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0037] Figure 1 1. It is a schematic diagram of the three-dimensional structure of the mold when the material blocking and demoulding assembly is blocked on the forging in the embodiment; Figure 3 It is a schematic diagram of the three-dimensional structure of the mold when the material blocking and demoulding component is not blocked on the forging in another embodiment.

[0038] like Figure 1-4 As shown, a die for aluminum alloy forging demolding in an embodiment includes a die 10 and a punch 20 arranged opposite to each other, a die cavity 101 is formed in the die 10, and the punch 20 and the die cavity 101 are matched with each other and move along the mold closing direction;

[0039] At least two material blocking and demoulding components 30 are evenly distributed around the lower end of the female die 10. The material blocking and demoulding components 30 include a forging blocking portion 301. The forging blocking portion 301 is removably disposed on the side of the die cavity 101 opening toward the male die 20.

[0040] The punch 20 is integrally formed, and includes a die head 201 and a push rod 202 connected to the die head 201; the circumferential side surfaces of the die head 201 and the push rod 202 are smoothly transitioned, the circumferential side surfaces of the die head 201 are arc surfaces, and the cross-sectional diameter of the push rod 202 is smaller than the maximum cross-sectional diameter of the die head 201.

[0041] like Figure 1-4 As shown, the working process of the mold is as follows:

[0042] Forging extrusion molding: the forging 80 is placed in the die cavity 101 of the die 10, the punch 20 moves toward the die 10 along the die closing direction, and a downward extrusion force is applied to the central area of ​​the forging 80 in the die 10 until the punch moves down to a predetermined height, and the forging is cooled and formed;

[0043] Demolding: The material-blocking demolding assembly 30 is displaced and pressed against the top surface of the forging 80 , and the punch 20 moves away from the die 10 . The forging 80 has a tendency to move upward with the punch 20 . Due to its own gravity and the obstruction of the material-blocking demolding assembly 30 , the punch 20 and the forging 80 are demolded.

[0044] Furthermore, the forging blocking portion 301 is removably disposed on a side of the forging 80 that faces the punch 20 along the mold closing direction.

[0045] Optionally, there are two or more material-blocking demolding assemblies 30, and they are evenly distributed on the circumferential edge of the lower end of the die 10; the forging blocking parts 301 of the material-blocking demolding assemblies 30 are evenly distributed on the forging 80, and a downward pressure force is dispersedly applied to the forging 80, and the circumferential force distribution on the top surface of the forging 80 is evenly distributed, and the demolding of the punch 20 and the forging 80 is smoother.

[0046] like Figure 4 As shown, the punch 20 includes a die head 201 and a push rod 202. In this embodiment, the die head 201 is a structure in which the diameter of the two end faces along the mold closing direction is smaller than the cross-sectional diameter of the middle part; along the mold closing direction, the length of the push rod 202 is much greater than the length of the die head 201, and the diameter of the push rod 202 is the same as the end face diameter of the die head 201. Based on this, after the forging 80 is extruded, only part of the circumferential side of the die head 201 on the punch 20 is in contact with the forging 80. During demolding, the structural design of the punch 20 reduces the contact area between the punch 20 and the forging 80, thereby facilitating the separation and demolding between the punch 20 and the forging 80, while making the blocking demolding assembly less stressed and more stable in structure.

[0047] In another preferred embodiment, it includes a lower pad 40, the upper surface of which is fixedly connected to a limiting member 50, the die 10 is arranged on the upper surface of the lower pad 40 and is clamped in a limiting area 501 enclosed by the limiting member 50; the material blocking demolding assembly 30 is detachably connected to the limiting member 50.

[0048] like Figure 1-3 As shown, by providing a limiting member 50, the position of the die 10 is limited in the horizontal direction.

[0049] The die 10 is clamped in the limiting area 501 of the limiting member 50, and the outer surface of the lower end of the die 10 is fitted and connected with the circumferential curved surface of the limiting area 501. The die 10 is removable relative to the limiting member 50 and the lower pad 40, so that it is convenient to replace the die with different cavity sizes but the same outer diameter according to actual production needs, and various types of forgings 80 can be extruded.

[0050] The resisting demoulding assembly 30 is arranged to be replaceable. On the one hand, the resisting demoulding assembly 30 adapted to the forging 80 can be replaced for forgings 80 of different heights to ensure that the resisting demoulding assembly 30 abuts against the top surface of the forging 80 after flipping, and can adapt to the extrusion demoulding of more types of forgings 80; on the other hand, the resisting demoulding assembly 30 will be worn out after long-term use and cannot achieve a good demoulding effect. At this time, compared with replacing the mold for the overall demoulding, only the resisting demoulding assembly 30 needs to be replaced, which is convenient to operate and helps to reduce equipment costs.

[0051] The lower pad 40 is provided to support the die 10 and disperse the extrusion force of the punch 20 when the forging is extruded along the die closing direction.

[0052] like Figure 3As shown, in another preferred embodiment, the material blocking demolding assembly 30 includes two side arms 302 and a forging blocking portion 301; one end of the side arm 302 is connected to the forging blocking portion 301, and the other end is connected to the limit member 50 through a rotating shaft.

[0053] The side arm portion 302 is connected to the limiting member 50 via a rotating shaft. The side arm portion 302 rotates around the rotating shaft to realize the rotation of the forging blocking portion 301 of the material blocking demoulding assembly 30 to the top of the forging 80 .

[0054] like Figure 1-3 As shown, in another preferred embodiment, a positioning connector 60 is included, and the two ends of the lower cushion block 40 are detachably connected with the positioning connector 60, and a lower pressing block 70 is sandwiched between the two positioning connectors 60, and the positioning connector 60 is detachably connected to the base surface.

[0055] A lower pressing block 70 is provided to support the lower cushion block 40 and bear the extrusion force when the punch 20 is extruded along the mold closing direction.

[0056] A positioning connector 60 is provided to fix the lower cushion block 40 and the lower pressing block 70 relative to the base surface, so as to ensure that the die 10 does not deviate when the punch 20 is pressed downward along the mold closing direction.

[0057] The positioning connector 60 is detachable, and the lower block 40, the die 10 and the material-blocking demolding assembly 30 are replaceable as a whole. The punches 20 with different outer diameters and the material-blocking demolding assemblies 30 with different models can be replaced, and forgings 80 of more sizes can be extruded and adapted. At the same time, when any component of the lower block 40, the die 10 and the material-blocking demolding assembly 30 is damaged and affects the quality of the forging 80, they can be replaced separately, which is beneficial to reducing the maintenance cost of the mold.

[0058] like Figure 2-3 As shown, in another preferred embodiment, it includes an upper pressing block 71 and an upper cushion block 41 , and the upper cushion block 41 is connected to the upper pressing block 71 and the punch 20 .

[0059] The upper pressing block 71 is provided to directly contact with a force applying mechanism such as a press, and after receiving force, the upper pressing block 71 transmits the pressure to the punch 20 to extrude the forging 80, thereby avoiding damage to the punch 20 caused by direct contact between the punch 20 and the force applying mechanism.

[0060] The upper pad 41 is provided to further support the pressure of the force-applying mechanism on the punch, thereby reducing the wear of the punch 20 and extending the service life of the punch 20 .

[0061] like Figure 5-6 As shown, in another preferred embodiment, a die blocking portion 303 is further provided on the material blocking demoulding assembly 30 , and the die blocking portion 303 is removably disposed on a side of the die 10 facing the punch 20 .

[0062] When the forging 80 is demolded from the die 10 , the die blocking portion 303 abuts against the top surface of the die 10 , thereby causing the forging 80 and the die 10 to be separated from each other.

[0063] like Figure 5-6 As shown, in another preferred embodiment, one of the two side arms 302 is rotatably connected to one end of the die blocking portion 303 through a rotating shaft, and the other is provided with a limiting groove 90 for accommodating the other end of the die blocking portion 303, and the limiting groove 90 has a first limiting portion 901 that is arranged to block the die blocking portion 303 away from the die 10.

[0064] like Figure 5-6 As shown, a die blocking portion 303 is provided to achieve demolding between the die 10 and the forging 80 .

[0065] In this embodiment, one end of the die blocking portion 303 is hinged to one of the side arm portions 302 , and the other end is clamped to the other side arm portion 302 .

[0066] Working of the utility model: when the punch 20 and the forging 80 are demolded, the forging blocking part 301 of the material blocking demolding assembly 30 works, at which time one end of the die blocking part 303 is connected to the side arm part 302, and the other end is separated from the side arm part 302 and away from the die 10; the die blocking part 303 is prevented from interfering with the demolding work of the forging blocking part 301; when the die 10 and the forging 80 are demolded, the two ends of the die blocking part 303 are respectively connected to the two side arms 302 to realize the demolding work.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A mold for facilitating demoulding of aluminum alloy forging, characterized in that: It comprises a concave mold (10) and a convex mold (20) which are arranged opposite to each other, wherein a mold cavity (101) is formed in the concave mold (10), and the convex mold (20) is matched with the mold cavity (101) in a concave-convex manner and moves along the mold closing direction; At least two material blocking and demoulding components (30) are evenly distributed circumferentially at the lower end of the female die (10), and the material blocking and demoulding components (30) include a forging blocking portion (301), and the forging blocking portion (301) is removably arranged on a side of the die cavity (101) opening toward the male die (20); The male mold (20) is integrally formed, and comprises a die head (201) and a push rod (202) connected to the die head (201); the circumferential side surfaces of the die head (201) and the push rod (202) are smoothly transitioned, the circumferential side surfaces of the die head (201) are cambered surfaces, and the cross-sectional diameter of the push rod (202) is smaller than the maximum cross-sectional diameter of the die head (201).

2. The die for facilitating demoulding of aluminum alloy forging according to claim 1, characterized in that: It comprises a lower pad (40), the upper surface of which is fixedly connected to a limiting member (50), the female mold (10) being arranged on the upper surface of the lower pad (40) and being clamped in a limiting area (501) enclosed by the limiting member (50); and the material blocking demoulding assembly (30) being detachably connected to the limiting member (50).

3. The die for facilitating demoulding of aluminum alloy forging according to claim 2, characterized in that: The material blocking demoulding assembly (30) comprises two side arms (302) and a forging blocking portion (301); one end of the side arm (302) is connected to the forging blocking portion (301), and the other end is connected to the limiting member (50) via a rotating shaft.

4. The die for facilitating demoulding of aluminum alloy forging according to claim 2, characterized in that: It comprises a positioning connection piece (60), the two ends of the lower cushion block (40) are detachably connected with the positioning connection piece (60), a lower pressing block (70) is sandwiched between the two positioning connection pieces (60), and the positioning connection piece (60) is detachably connected to the base surface.

5. The die for facilitating demoulding of aluminum alloy forging according to claim 1, characterized in that: It comprises an upper pressing block (71) and an upper cushion block (41), wherein the upper cushion block (41) is connected to the upper pressing block (71) and the male mold (20).

6. The die for facilitating demoulding of aluminum alloy forging according to claim 3, characterized in that: The material blocking demoulding assembly (30) is also provided with a female mold blocking portion (303), and the female mold blocking portion (303) is removably disposed on a side of the female mold (10) facing the male mold (20).

7. The die for facilitating demoulding of aluminum alloy forging according to claim 6, characterized in that: One of the two side arm parts (302) is rotatably connected to one end of the die blocking part (303) via a rotating shaft, and the other is provided with a limiting groove (90) for accommodating the other end of the die blocking part (303), and the limiting groove (90) has a first limiting part (901) which is arranged to block the die blocking part (303) away from the die (10).

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