Aluminum hot extrusion die for ultrathin high-precision harmonica-shaped tube profile

Abstract

The utility model discloses an aluminum hot extrusion die for an ultrathin high-precision harmonica-shaped tube profile, and belongs to the technical field of aluminum extrusion dies. The die comprises a die body, and the die body comprises a lower die and a micro-through mechanism. The lower die comprises a die disc, a die cavity and a liquid inlet hole; the micro-channel mechanism comprises a mold insert part, a mold core, a micro-channel flat sheet and a protective sleeve arranged between the micro-channel flat sheet and the fins. The aluminum hot extrusion die for the ultrathin high-precision harmonica-shaped tube profile adopts a special die structure mode comprising the front protective sleeve, the die core, the die insert part and the lower die instead of a traditional integrated die, when a die hole of the die is damaged, the whole lower die does not need to be replaced, only corresponding parts need to be replaced, and the production cost is reduced. Overall replacement can be carried out without stopping production for a long time, parts can be rapidly replaced, the stopping time is shortened, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to aluminium extrusion die technical field, especially in a kind of aluminium hot extrusion die for ultra-thin high-precision concertina tube section. BACKGROUND

[0002] With the rapid development of automobile industry, aluminium extrusion processing field faces increasingly high technical challenge, especially in the extrusion processing of microchannel aluminium flat tube. Microchannel porous aluminium flat tube (microchannel flat tube for short) is the key material of automobile air conditioner heat exchanger, and is usually used to manufacture evaporator. The assembly of evaporator usually adopts the way that double-layer microchannel flat tube and fin are alternately arranged, and then header is arranged at both ends. This material is in the shape of concertina tube.

[0003] In the design of extrusion die of microchannel aluminium flat tube, due to its very small cross section, the current die design adopts the structure that upper die and lower die are separated, and die hole is arranged on lower die sheet. The lower die of the currently used upper-lower die separation type microchannel aluminium flat tube extrusion die is an integral whole, and once die hole is damaged, the entire lower die needs to be replaced, which not only leads to die waste, but also prolongs the die replacement cycle and affects the timeliness of delivery. Therefore, it is imminent to develop a die structure that is easy to replace. For this purpose, the utility model provides a kind of aluminium hot extrusion die for ultra-thin high-precision concertina tube section. CONTENT OF UTILITY MODEL

[0004] The utility model aims at providing a kind of aluminium hot extrusion die for ultra-thin high-precision concertina tube section to solve the problem that the lower die of the current microchannel aluminium flat tube extrusion die is an integral whole, and when die hole is damaged, the entire lower die needs to be replaced, causing die waste.

[0005] To solve the above technical problem, the utility model provides a kind of aluminium hot extrusion die for ultra-thin high-precision concertina tube section, including die body, the die body includes lower die, and microchannel mechanism setting in one side of the lower die;

[0006] The lower die includes die disc, die cavity setting in the die disc, and liquid inlet hole setting in one side of the die cavity;

[0007] The microchannel mechanism includes die insert setting in one side of the die cavity, die core setting in one side of the die insert, microchannel flat sheet setting in one side of the die core, and protective sleeve setting between the microchannel flat sheet and die core fin.

[0008] Preferably, the liquid inlet hole has two, and is symmetrically distributed on both sides of the center line of lower die.

[0009] Preferably, the outer wall of die insert cooperates with the inner wall of die cavity.

[0010] The mold insert part comprises a mold core hole and a cavity arranged on the side of the protective sleeve facing away from the mold core hole.

[0011] Preferably, the mold core is in the shape of a "fin".

[0012] Preferably, the micro-channel flat piece comprises a shunt hole arranged in the center thereof, and the mold core "fin" is inserted into the shunt hole at one end.

[0013] Preferably, the protective sleeve comprises a flat piece groove arranged on the outer side and penetrating through.

[0014] The micro-channel flat piece is arranged in the flat piece groove.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1. The aluminum hot extrusion die for the ultrathin high-precision harmonica tube profile adopts a special mold structure mode comprising a front protective sleeve, a mold core, a mold insert part and a lower mold, instead of a traditional integrated mold. When the mold hole is damaged, the corresponding part can be replaced without the need to stop production for a long time for overall replacement, the part is quickly replaced, the downtime is shortened, and the production efficiency is improved.

[0017] 2. The shunt hole in the aluminum hot extrusion die for the ultrathin high-precision harmonica tube profile adopts a traditional linear bridge design scheme. In the mold processing of the harmonica tube profile, the pressure of fluid flow can be dispersed to the greatest extent, so that the overall stress of the mold is reduced, and the risk of deformation and damage is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is an explosion view of the aluminum hot extrusion die for the ultrathin high-precision harmonica tube profile provided by the utility model;

[0019] Fig. 2 is a sectional view of the aluminum hot extrusion die for the ultrathin high-precision harmonica tube profile provided by the utility model;

[0020] Fig. 3 is a structural schematic view of the mold core in the aluminum hot extrusion die for the ultrathin high-precision harmonica tube profile provided by the utility model;

[0021] In the drawing: 1, mold part; 2, lower mold; 201, mold disc; 202, mold cavity; 203, liquid inlet hole; 3, micro-channel structure; 301, mold insert part; 301a, mold core hole; 301b, cavity; 302, mold core; 303, micro-channel flat piece; 303a, shunt hole; 304, protective sleeve; 304a, flat piece groove. DETAILED DESCRIPTION

[0022] The utility model will be made further detailed description below combining with the drawings and specific embodiments. The advantages and features of the utility model will be more clear according to the following description and claims. It should be noted that, the drawings all adopt very simplified form and all use non-precise proportion, only to facilitate, clear and assist the purpose of description of the utility model embodiment.

[0023] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0024] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances. Embodiment

[0025] The utility model provides a kind of for super thin high-precision harmonica tube section aluminum hot extrusion die, please refer to Figs. 1-3 , including die 1, the die 1 includes lower die 2, and the micro channel mechanism 3 of setting in lower die 2 one side;The lower die 2 includes die disc 201, setting in the die cavity 202 of die disc 201, and setting in the liquid inlet hole 203 of die cavity 202 one side;The micro channel mechanism 3 includes the die insert fittings 301 of setting in the die cavity 202 inside one side, the die core 302 of setting in the die insert fittings 301 one side, the micro channel flat sheet 303 of setting in the die core 302 one side, and the protective sleeve 304 of setting in the micro channel flat sheet 303 and die core 302 fin between.

[0026] The liquid inlet hole 203 is two, symmetrically distributed on both sides of the center line of the lower mold 2; the outer wall of the mold insert part 301 is matched with the inner wall of the mold cavity 202; the mold insert part 301 comprises a mold core hole 301a and a cavity 301b arranged on the side of the mold core hole 301a towards the protective sleeve 304; the mold core 302 is in the shape of a "fin"; the micro-channel flat sheet 303 comprises a shunt hole 303a opened in the center thereof, and the "fin" end of the mold core 302 is inserted along the shunt hole 303a; the protective sleeve 304 comprises a flat sheet groove 304a arranged on the outer side and penetrating through; and the micro-channel flat sheet 303 is installed in the flat sheet groove 304a.

[0027] It should be noted that the shunt hole 303a in the micro-channel flat sheet 303 adopts a one-bar bridge structure, which can maximize the problem of high fluid pressure and supply, and the three-piece structure of the mold insert part 301, the mold core 302 and the protective sleeve 304 is adopted in the mold, which greatly reduces the impact of aluminum flow on the mold insert part 301, effectively protects the mold body 1 and reduces the risk of deformation and damage.

[0028] As shown in Fig. 2 An aluminum hot extrusion die for ultra-thin high-precision harmonica tube profiles, when extruding, the aluminum rod enters the one-bar bridge position through the front protective sleeve 304, which can more evenly distribute the flow to the two shunt holes 303a while ensuring higher mold strength, and after passing through the cavity 301b and the mold cavity 202 working zone, qualified harmonica tube profiles can be mass-produced.

[0029] In use, the aluminum flow enters the mold cavity 202 through the two liquid inlet holes 203, passes through the mold core hole 301a and is extruded into the cavity 301b, the aluminum flow in the cavity 301b passes through the mold core 302 from the fin slot at the end of the mold core 302, and after extrusion, it passes through the shunt hole 303a again, and finally forms and flows out from the outlet of the protective sleeve 304, thereby completing the hot extrusion production of the harmonica tube profile.

[0030] In summary, the aluminum hot extrusion die for ultra-thin high-precision harmonica tube profiles of the present application adopts a special mold structure mode comprising a front protective sleeve, a mold core, a mold insert part and a lower mold, rather than a traditional integrated mold. When the mold hole is damaged, the corresponding parts can be replaced without the need to replace the entire lower mold, without the need to stop production for a long time for overall replacement, the parts can be quickly replaced, the downtime is shortened, and the production efficiency is improved. At the same time, the shunt hole adopts the traditional one-bar bridge design scheme, which can maximize the dispersion of fluid flow pressure in the mold processing of the harmonica tube profile, thereby reducing the overall stress of the mold and reducing the risk of deformation and damage.

[0031] The above description is only the description of the preferred embodiment of the utility model, and is not any limitation on the range of the utility model. Any change and modification of the above disclosure by the ordinary skilled in the art is within the protection scope of the claims.

Claims

1. An aluminum hot extrusion die for an ultrathin high-precision harmonica tube profile, characterized by, Comprising, The mold (1) comprises a lower mold (2) and a micro-channel mechanism (3) arranged on one side of the lower mold (2); The lower mold (2) comprises a mold plate (201), a mold cavity (202) arranged in the mold plate (201), and a liquid inlet hole (203) arranged on one side of the mold cavity (202); The micro-channel mechanism (3) comprises a mold insert (301) arranged on one side of the mold cavity (202), a mold core (302) arranged on one side of the mold insert (301), a micro-channel flat sheet (303) arranged on one side of the mold core (302), and a protective sleeve (304) arranged between the micro-channel flat sheet (303) and the mold core (302).

2. The aluminum hot extrusion die for an ultrathin high-precision harmonica tube profile according to claim 1, characterized in that, The liquid inlet hole (203) has two symmetrical distribution on both sides of the center line of the lower mold (2).

3. An aluminum hot extrusion die for an ultrathin high-precision harmonica tube profile according to claim 2, characterized in that, The outer wall of the mold insert (301) cooperates with the inner wall of the mold cavity (202); The mold insert (301) comprises a mold core hole (301a) and a cavity (301b) arranged on one side of the mold core hole (301a) and facing the protective sleeve (304).

4. The aluminum hot extrusion die for an ultrathin high-precision harmonica tube profile according to claim 1, characterized in that, The mold core (302) is in the shape of "fin".

5. The aluminum hot extrusion die for an ultrathin high-precision harmonica tube profile according to claim 1, characterized in that, The micro-channel flat sheet (303) comprises a shunt hole (303a) opened in the center, and the "fin" end of the mold core (302) is inserted along the shunt hole (303a).

6. An aluminum hot extrusion die for an ultrathin high-precision harmonica tube profile according to claim 5, characterized in that, The protective sleeve (304) comprises a flat sheet groove (304a) arranged on the outer side and penetrating; The micro-channel flat sheet (303) is installed in the flat sheet groove (304a).

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