Aluminum bar extruding and extending equipment

Abstract

The invention relates to aluminum bar extrusion extension equipment which comprises an upper die, a die core is fixed to the side wall of the upper die, a separation boss is arranged around the connecting root of the die core and the upper die, the die core is sleeved with an exhaust core cone, the end of the die core protrudes out of the exhaust core cone, a plurality of sets of exhaust grooves are formed in the side wall of the exhaust core cone, and a plurality of sets of exhaust holes are formed in the exhaust grooves. The exhaust hole is communicated with the separation boss and the interior of the upper die, and a lower die is arranged on the side wall of the upper die and located on one side of the die core. The exhaust core cone is arranged in a taper mode, the aluminum profile can be guided to be the same as the mold core in size, gas can be exhausted from the exhaust holes in the exhaust groove when the aluminum profile flows along the taper, the exhaust holes are always kept at the upward inclined angles opposite to the gravity direction, the aluminum profile is prevented from blocking the exhaust holes, and the gas is exhausted preferentially.

Description

Technical Field

[0001] The present invention belongs to the technical field of aluminum forming, and specifically refers to an aluminum bar extrusion and extension device. Background Art

[0002] Aluminum extrusion forming is a relatively simple and low-cost process, commonly used for producing standard profiles. This process is a processing method in which an aluminum alloy material is heated to a plastic state and then, by applying high pressure, the aluminum blank in the die cavity undergoes plastic deformation to form a product with a specific cross-sectional shape. The shape of the aluminum profile is determined by the extrusion die.

[0003] The quality of aluminum profile extrusion is closely related to the extrusion die. During extrusion, since the aluminum material is in close contact with the die, there is often a phenomenon that gas is trapped between the aluminum material and the die. If the gas cannot be discharged, the surface of the aluminum profile is likely to delaminate and peel, or inclusion pores are generated inside the aluminum profile, weakening the mechanical properties of the profile. Summary of the Invention

[0004] In view of the above situation, to overcome the defects of the prior art, the present invention provides an aluminum bar extrusion and extension device, which at least partially solves the above problems.

[0005] The technical solution adopted by the present invention is as follows: An aluminum bar extrusion and extension device proposed by the present invention includes a conveying table, a die holder is provided on the conveying table, an upper die is provided in the die holder, and a hydraulic press is further provided on the conveying table, and the hydraulic press is arranged on the feeding side on one side of the upper die in the die holder.

[0006] Further, a plurality of groups of through-flow distribution holes are provided on the side wall of the upper die, and a die core is fixed on the side wall of the upper die.

[0007] Further, a lower die is provided on the side wall of the upper die on the side of the die core, the lower die is sleeved on the die core, and the inner cavity of the lower die is open.

[0008] Further, a separation boss is provided around the connection root of the die core and the upper die, an exhaust core cone is sleeved on the die core, the lower die is sleeved outside the exhaust core cone, and the end of the die core protrudes from the exhaust core cone.

[0009] Further, a plurality of groups of exhaust grooves are provided on the side wall of the exhaust core cone, a plurality of groups of exhaust holes are provided on the exhaust grooves, and the exhaust holes are communicated with the separation boss and the inside of the upper die for discharging gas to the outside.

[0010] Further, the side wall angle of the exhaust groove is not parallel to the taper surface of the exhaust core cone. Preferably, the side wall of the exhaust groove is in the vertical direction perpendicular to the conveying table, the exhaust holes are on the vertical side wall of the exhaust groove, and the initial section of the exhaust holes always maintains an upward inclination angle opposite to the direction of gravity.

[0011] Furthermore, in order to uniformly process the gas in the exhaust holes, a first collecting groove is provided at the root of the exhaust core cone close to the upper die, and all the exhaust holes communicate with the first collecting groove.

[0012] Furthermore, a second collecting groove is provided on the separation boss, the first collecting groove communicates with the second collecting groove, and multiple groups of guiding holes communicating with the upper die are provided on the second collecting groove.

[0013] Furthermore, in order to guide the gas in the upper die to the periphery, multiple groups of outer exhaust holes are provided in the upper die, the outer exhaust holes communicate with the guiding holes, an annular groove is provided on the circumferential side wall of the upper die, the annular groove communicates with the outer exhaust holes, and the annular groove communicates with the air holes on the die holder, finally.

[0014] The beneficial effects achieved by the present invention are as follows: The exhaust core cone is provided with a taper, which can guide the aluminum profile to the same size as the die core, and can also enable the gas to be discharged from the exhaust holes on the exhaust groove when the aluminum material flows along the taper. Moreover, the exhaust holes always maintain an inclined upward angle opposite to the direction of gravity to prevent the aluminum material from blocking the exhaust holes and enable the gas to be discharged preferentially. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the aluminum rod extrusion and elongation equipment according to an embodiment of the present invention; Figure 2 is a cross-sectional view of the upper die, the lower die and the exhaust core cone; Figure 3 is an exploded view of the upper die, the lower die and the exhaust core cone; Figure 4 is a cross-sectional view of the exhaust core cone; Figure 5 is a schematic structural diagram of the upper die; Figure 6 is a cross-sectional view of the upper die.

[0016] Wherein, 1, conveying table; 2, hydraulic press; 3, die holder; 4, upper die; 5, lower die; 6, exhaust core cone; 7, exhaust groove; 8, exhaust hole; 9, first collecting groove; 10, shunt hole; 11, separation boss; 12, die core; 13, second collecting groove; 14, guiding hole; 15, outer exhaust hole; 16, annular groove.

[0017] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0020] As Figure 1 shown, an aluminum rod extrusion and elongation device proposed in an embodiment of the present invention includes a conveying table 1 for conveying the heated aluminum rod. A mold rack 3 is provided on the conveying table 1, and an upper mold 4 is provided inside the mold rack 3. The heated aluminum rod is fed from one side of the upper mold 4. A hydraulic press 2 is also provided on the conveying table 1, and the hydraulic press 2 is arranged on the feeding side on one side of the upper mold 4 in the mold rack 3. The hydraulic press 2 applies pressure to the aluminum rod to press the heated plastic aluminum rod into the upper mold 4.

[0021] As Figure 2 and Figure 3 shown, a plurality of groups of through-flow shunt holes 10 are provided on the side wall of the upper mold 4. The number of the shunt holes 10 is related to the cross-sectional shape of the aluminum profile to be processed. After the heated aluminum rod is extruded by the hydraulic press 2, the aluminum rod will be divided into multiple groups and flow into the shunt holes 10 to separate the aluminum rod into more fine strands for subsequent extrusion molding. A mold core 12 is fixed on the side wall of the upper mold 4, and the cross-sectional shape of the mold core 12 is the same as the inner side wall of the cross-section of the aluminum profile, that is, the mold core 12 is used to shape the inner side wall of the aluminum profile.

[0022] A lower mold 5 is provided on the side wall of the upper mold 4 on the side of the mold core 12. The lower mold 5 is sleeved on the mold core 12, and the inner cavity of the lower mold 5 is open. When the aluminum material is extruded and flows, it gradually flows from the large opening end of the lower mold 5 to the small opening end, and then cooperates with the mold core 12 with a fixed shape. The aluminum material flows in the cavity with a gradually decreasing gap to reduce the resistance when the aluminum material is extruded, so that the aluminum material is gradually formed into a set thickness for gradual extrusion molding. Moreover, the shape of the gap formed by the cooperation of the side of the lower mold 5 far from the upper mold 4 and the mold core 12 is the same as the cross-section of the aluminum profile, that is, the cross-sectional shape of the end of the inner cavity of the lower mold 5 defines the outer wall of the aluminum profile, and the cross-sectional shape of the mold core 12 defines the inner wall of the aluminum profile. Under the cooperation of the lower mold 5 and the mold core 12, the extruded aluminum material is formed into a set pipe shape.

[0023] Combined withFigure 5 As shown in the figure, a separating boss 11 is provided around the connecting root of the core 12 and the upper die 4. The cross-sectional dimension of the separating boss 11 is larger than that of the core 12. An exhaust core cone 6 is sleeved on the core 12, and the lower die 5 is sleeved on the periphery of the exhaust core cone 6. The exhaust core cone 6 can guide the flowing aluminum material to move along a certain slope, further reducing the gap of the flowing space of the aluminum material, so that the thickness of the aluminum material is slowly reduced, and the forming resistance of the aluminum material is reduced; at the same time, in order not to affect the final shaping of the aluminum material, the end of the core 12 protrudes from the exhaust core cone 6, that is, the cross-sectional shape of the aluminum material is still determined by the lower die 5 and the core 12 and will not be affected by the exhaust core cone 6.

[0024] As Figure 4 shown in the figure, in order to discharge the gas generated during the extrusion and shaping of the aluminum material, multiple groups of exhaust grooves 7 are provided on the side wall of the exhaust core cone 6, and multiple groups of exhaust holes 8 are provided on the exhaust grooves 7. The exhaust holes 8 are communicated with the inside of the separating boss 11 and the upper die 4 for discharging the gas to the outside.

[0025] The side wall angle of the exhaust groove 7 is not parallel to the taper surface of the exhaust core cone 6. Preferably, the side wall of the exhaust groove 7 is in the vertical direction perpendicular to the conveying table 1. The exhaust holes 8 are located on the vertical side wall of the exhaust groove 7, and the initial section of the exhaust holes 8 always maintains an upward inclination angle opposite to the direction of gravity, that is, on different sides of the exhaust core cone 6, the included angles between each exhaust hole 8 and the horizontal plane are not the same. It is only necessary to ensure that the included angle between the guiding direction of the initial section of each side exhaust hole 8 and the direction of gravity is an obtuse angle. Under this angle setting, the pipe material will be preferentially pulled by gravity to move obliquely downward instead of moving into the exhaust holes 8. Only the internal gas is squeezed into the exhaust air, thereby completing the exhaust operation. In some embodiments, the side wall of the exhaust groove 7 can also be set to be inclined.

[0026] In order to uniformly process the gas in the exhaust holes 8, a first collecting groove 9 is provided at the root of the exhaust core cone 6 close to the upper die 4, and all the exhaust holes 8 are communicated with the first collecting groove 9, that is, the gas in each side during the extrusion molding of the pipe material will be introduced into the first collecting groove 9 for centralized processing.

[0027] As Figure 5 and Figure 6 shown in the figure, a second collecting groove 13 is provided on the separating boss 11. The first collecting groove 9 is communicated with the second collecting groove 13. The gas collected by the first collecting groove 9 is further guided to the end of the second collecting groove 13. Multiple groups of guiding holes 14 communicated with the upper die 4 are provided on the second collecting groove 13. The gas is further guided into the upper die 4 through the guiding holes 14 at the end of the second collecting groove 13. The number of the guiding holes 14 is adapted to the number of the side walls of the exhaust core cone 6 to improve the exhaust speed and reduce the influence of the gas on the pipe material forming.

[0028] In order to guide the gas in the upper die 4 to the periphery, multiple groups of outer exhaust holes 15 are provided in the upper die 4. The outer exhaust holes 15 are communicated with the guiding holes 14. An annular groove 16 is provided on the circumferential side wall of the upper die 4. The annular groove 16 is communicated with the outer exhaust holes 15. The annular groove 16 is communicated with the air holes (not shown in the drawings) on the die holder 3. Finally, the gas in each guiding hole 14 converges into the annular groove 16 through the outer exhaust holes 15 and is then discharged out of the device through the air holes on the die holder 3, thus completing the process of exhausting from the inside to the outside in the pipe extrusion process.

[0029] The specific working principle is as follows: After being heated, the aluminum rod is placed on the conveying table 1 between the hydraulic press 2 and the die holder 3. Then the hydraulic press 2 is started, and the hydraulic press 2 pushes the aluminum rod to move towards the upper die 4. When the aluminum rod contacts the upper die 4, the aluminum rod is divided into multiple strands of finer aluminum materials by the shunt holes 10 under the action of pressure.

[0030] The extruded aluminum materials enter from the respective shunt holes 10, reach the separating boss 11, and continue to move from the separating boss 11 to the surface of the exhaust core cone 6 until they flow to the die core 12. During this process, the gap between the exhaust core cone 6 and the inner side wall of the lower die 5 gradually decreases, causing the aluminum materials to be extruded into thin sheets with unfixed shapes.

[0031] When the aluminum materials move to the exhaust groove 7, the gas contained in the aluminum materials will move obliquely upward against gravity from the exhaust holes 8, while the aluminum materials move out of the exhaust groove 7 under the action of gravity, thrust, and inertia and continue to move along the surface of the exhaust core cone 6 until they move to the next set of exhaust grooves 7.

[0032] After entering from the exhaust holes 8, the gas will reach the first collecting groove 9 and the second collecting groove 13, enter the guiding holes 14, then enter the annular groove 16 through the outer exhaust holes 15, and finally be discharged from the die holder 3. When the aluminum materials reach the next set of exhaust grooves 7, the above process will be repeated to complete the exhaust.

[0033] When the aluminum materials move to the tip of the exhaust core cone 6, the aluminum materials contact the outer wall of the die core 12, completing the shaping of the inner wall contour of the cross-section of the aluminum profile, while the inner wall of the open cavity of the lower die 5 shapes the outer wall contour of the aluminum profile, thus completing the extrusion and shaping of the entire aluminum profile.

[0034] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0035] The above describes the present invention and its embodiments. Such description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design similar structural forms and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. An aluminum rod extrusion and elongation device, comprising a die holder (3), characterized in that, Further comprising: An upper die (4), fixed to the die holder (3), a die core (12) is fixed to the side wall of the upper die (4), and a separating boss (11) is provided around the connecting root of the die core (12) and the upper die (4); An exhaust core cone (6), sleeved on the die core (12), the end of the die core (12) protrudes from the exhaust core cone (6), multiple groups of exhaust grooves (7) are provided on the side wall of the exhaust core cone (6), multiple groups of exhaust holes (8) are provided on the exhaust grooves (7), and the exhaust holes (8) are communicated with the separating boss (11) and the inside of the upper die (4) for discharging gas outwards; A lower die (5), arranged on the side wall of one side of the die core (12) in the upper die (4).

2. The aluminum rod extrusion and elongation device according to claim 1, characterized in that: The exhaust holes (8) are on the vertical side wall of the exhaust grooves (7), and the initial section of the exhaust holes (8) always maintains an upward inclination angle opposite to the direction of gravity.

3. The aluminum rod extrusion and elongation device according to claim 2, characterized in that: A first collecting groove (9) is provided at the root of the exhaust core cone (6) close to the upper die (4), and all the exhaust holes (8) are communicated with the first collecting groove (9).

4. The aluminum bar extrusion and elongation device according to claim 3, characterized in that: A second collecting groove (13) is provided on the separating boss (11), the first collecting groove (9) is communicated with the second collecting groove (13), multiple groups of guiding holes (14) communicated with the upper die (4) are provided on the second collecting groove (13), and the number of the guiding holes (14) is adapted to the number of the side walls of the exhaust core cone (6).

5. The aluminum bar extrusion and extension equipment according to claim 4, characterized in that: Multiple groups of outer discharge holes (15) are provided in the upper die (4), and the outer discharge holes (15) are communicated with the guiding holes (14).

6. The aluminum bar extrusion and elongation device according to claim 5, characterized in that: An annular groove (16) is provided on the circumferential side wall of the upper die (4), the annular groove (16) is communicated with the outer discharge holes (15), and the annular groove (16) is communicated with the air holes on the die holder (3).

7. The aluminum rod extrusion and elongation device according to claim 1, characterized in that: Multiple groups of flow dividing holes (10) are provided on the upper die (4), and the number of the flow dividing holes (10) is related to the cross-sectional shape of the aluminum profile.

8. The aluminum bar extrusion and elongation device according to claim 1, wherein: The lower die (5) is sleeved on the die core (12) and the exhaust core cone (6), and the inner cavity of the lower die (5) is in an open shape.

Images