Hot extrusion die for producing automobile energy absorption box profile

Abstract

The utility model discloses a hot extrusion die for producing an automobile energy absorption box section bar, which comprises an upper die and a shunting bridge arranged in the upper die, the shunting bridge comprises a middle body and a support body, the middle body is gradually diffused outwards from top to bottom and is in a trapezoid shape on the whole, and the support body is connected with the middle body. The interior of the upper die is divided into a plurality of flow dividing holes by the middle body and the supporting body. The width of the top of the support body is set to be 1mm, so that the contact area between the top of the shunting bridge and molten aluminum is reduced, the impact force of the molten aluminum on the whole upper die is reduced, and the whole service life of the die body is prolonged; furthermore, an arc-shaped surface, a boss, a groove and an inclined surface section are arranged, so that when molten aluminum flowing out of the upper die is transited to the lower die, the flow velocity difference of the periphery of a working tape is small, the uniform flow velocity of the molten aluminum is ensured, sufficient molten aluminum can smoothly and stably flow to a cavity, hot extrusion production of the automobile energy absorption box is completed, and the quality of a finished product is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of hot extrusion dies of production automobile energy absorption box profile. BACKGROUND

[0002] Automobile energy absorption box is an important component installed in automobile bumper system, between crossbeam and frame longitudinal beam, usually made of metal material, designed as thin-walled component, based on plastic deformation of object in intense collision, absorbing and dissipating energy by deformation when collision, it is an ideal energy absorption mode, so as to greatly reduce the damage of collision to vehicle and occupant, with the development of new energy vehicles, the performance requirement of automobile energy absorption box aluminum material is increasing, currently automobile energy absorption box is produced by the way of extruding aluminum liquid using hot extrusion die;

[0003] However, the impact force of aluminum flow on the upper die is large when flowing into the upper die during the production of automobile energy absorption box using the existing hot extrusion die, and the aluminum flow cannot be effectively guided when flowing out through the shunt hole, so the aluminum flow is difficult to flow smoothly and stably towards the cavity, resulting in poor quality of automobile energy absorption box finished product.

[0004] Therefore, it is necessary to invent a kind of hot extrusion die for producing automobile energy absorption box profile to solve the above problems. CONTENT OF UTILITY MODEL

[0005] (I) purpose of utility model

[0006] To solve the technical problems in the background art, the utility model provides a kind of hot extrusion die for producing automobile energy absorption box profile, by setting the width of the top of the support body to 1mm, the contact area of the top of the shunt bridge with aluminum liquid is reduced, the impact force of aluminum liquid on the whole upper die is reduced, and the overall service life of the die is improved;Further, by setting arc surface, boss, groove and inclined surface section, the aluminum liquid flowing out of the upper die has small velocity difference around the working zone when passing to the lower die, ensuring uniform aluminum liquid flow rate, and sufficient aluminum liquid can flow smoothly and stably to the cavity, completing the hot extrusion production of automobile energy absorption box and ensuring the quality of finished product.

[0007] (II) technical scheme

[0008] To achieve the above purpose, the utility model provides the following technical scheme: a kind of hot extrusion die for producing automobile energy absorption box profile, including upper die, and shunt bridge being set in the interior of the upper die;

[0009] The shunt bridge includes a middle body that gradually spreads outward from top to bottom and has a trapezoidal shape as a whole, and a support body connected to the middle body, and the interior of the upper die is separated into several shunt holes by the middle body and the support body.

[0010] The support body is provided with an arc-shaped surface outwardly protruding at the middle of the two side faces, a lower hollow cutter is connected to the bottom of the middle body, a boss is outwardly protruded at the connection between the front and rear side faces of the middle body and the lower hollow cutter, a groove is inwardly recessed at the connection between the left and right side faces of the middle body and the lower hollow cutter, and an inclined surface section is arranged at each corner of the lower hollow cutter.

[0011] Preferably, the width of the top of the support body is 1mm, and the angle of the arc-shaped surface is not greater than 60 degrees.

[0012] Preferably, the lower die is further arranged at the bottom of the upper die, the lower die comprises a welding chamber arranged at the top of the lower die, a cavity arranged in the lower die and communicated with the welding chamber, and a discharge hole arranged at the bottom of the lower die and communicated with the cavity.

[0013] Preferably, the bottom of the lower hollow cutter is connected with a working belt, which can form a forming gap between the inner wall of the cavity after being inserted into the cavity, and is used for extrusion production of the automobile energy absorption box, and the bottom of the working belt is further connected with an upper hollow cutter.

[0014] Preferably, the thickness of the boss is 3-5 times of the width of the forming gap.

[0015] Preferably, the inside of the groove is rounded, and the depth of the groove is 2-4 times of the width of the forming gap.

[0016] Preferably, the angle of the inclined surface section is 45 degrees, the depth of the welding chamber is greater than 5mm, the height of the inclined surface section is equal to the depth of the welding chamber, and the height of the upper hollow cutter is greater than the vertical distance between the inclined surface section and the cavity.

[0017] Preferably, the upper die and the lower die are tightly matched into a die body through fasteners, and the assembly mode is a reverse stop opening assembly mode.

[0018] Compared with the prior art, the beneficial effects of the above technical scheme of the utility model are:

[0019] 1. The width of the top of the support body is 1mm, so that the aluminum liquid can be separated by the width of 1mm, the contact area between the top of the shunt bridge and the aluminum liquid is reduced, the impact force of the aluminum liquid on the whole upper die is reduced, and the overall service life of the die body is improved.

[0020] 2, the utility model discloses a can guide the arc surface of aluminium liquid flow, make aluminium liquid flow in the inside of shunt hole, and the friction between the support body is less, and the flowing speed is smooth and stable, and the design of boss makes the flow path of aluminium liquid flowing on the long side of lower air knife length, and the speed of its outflow is small, simultaneously, through being provided with recess, make the flow rate of aluminium liquid flowing on the short side of lower air knife is big, reduce the flow rate difference of aluminium liquid around lower air knife, and the setting of inclined surface section guarantees that the four corners of work zone are supplied with sufficient material, and aluminium liquid can flow to the cavity fully, smoothly and stably, guarantee the production quality of automobile energy absorption box. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to make the technical personnel in the art better understand the technical scheme of the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments, obviously, the drawings in the following description are only some embodiments described in the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings.

[0022] Figure 1 It is the whole structure schematic diagram of the utility model;

[0023] Figure 2 It is the half sectional view of the utility model;

[0024] Figure 3 It is the sectional view of the upper die of the utility model;

[0025] Figure 4 It is the explosion drawing of the utility model;

[0026] Figure 5 It is the explosion drawing of another angle of the utility model.

[0027] Mark explanation:

[0028] 1 upper die, 2 shunt bridge, 21 intermediate body, 22 support body, 3 shunt hole, 4 arc surface, 5 lower air knife, 6 boss, 7 recess, 8 inclined surface section, 9 lower die, 10 welding chamber, 11 cavity, 12 discharge hole, 13 work zone, 14 upper air knife, 15 forming gap. DETAILED DESCRIPTION

[0029] In order to make the technical personnel in the art better understand the technical scheme of the present application, the following will be further introduced in detail to the utility model with the drawings.

[0030] The utility model provides a kind of hot extrusion die for producing automobile energy absorption box profile as Figures 1-5 As shown in formula, including upper die 1, and the shunt bridge 2 being set in the inside of the upper die 1;

[0031] The shunt bridge 2 comprises a middle body 21 which gradually spreads outward from top to bottom and has a trapezoidal shape as a whole, and a support body 22 connected with the middle body 21, and the inside of the upper die 1 is spaced by the middle body 21 and the support body 22 to form a plurality of shunt holes 3;

[0032] The middle part of the two side faces of the support body 22 is outwardly convex with an arc face 4, the bottom of the middle body 21 is connected with a lower hollow cutter 5, the front and rear side faces of the middle body 21 are outwardly convex with a boss 6 at the connection with the lower hollow cutter 5, the left and right side faces of the middle body 21 are inwardly recessed with a groove 7 at the connection with the lower hollow cutter 5, and the four corners of the lower hollow cutter 5 are provided with a bevel segment 8.

[0033] The lower die 9 is further provided at the bottom of the upper die 1, and the lower die 9 comprises a welding chamber 10 opened at the top of the lower die 9, a cavity 11 opened in the inside of the lower die 9 and communicated with the welding chamber 10, and a discharge hole 12 opened at the bottom of the lower die 9 and communicated with the cavity 11.

[0034] In one embodiment, the width of the top of the support body 22 is 1mm, the contact area of the top of the shunt bridge 2 with the aluminum liquid is reduced, and the impact force of the aluminum liquid on the upper die 1 is reduced, the inclination angle of the arc face 4 is not greater than 60 degrees, the flow path of the aluminum liquid is guided, and the friction between the aluminum liquid and the support body 22 can be effectively reduced.

[0035] In one embodiment, the bottom of the lower hollow cutter 5 is connected with a working belt 13, which can form a forming gap 15 between the inner wall of the cavity 11 after being inserted into the cavity 11, is used for extrusion production of the automobile energy absorption box, can ensure the strength of the working belt 13, and guides the aluminum liquid to make the flow speed of the aluminum liquid stable, and the bottom of the working belt 13 is further connected with an upper hollow cutter 14, which can ensure that the aluminum liquid smoothly passes through the cavity 11, avoid the automobile energy absorption box from being blocked during production, and ensure the quality of finished products.

[0036] In one embodiment, the thickness of the boss 6 is 3-5 times the width of the forming gap 15, the flow path of the aluminum liquid flowing through the long side of the lower hollow cutter 5 is lengthened, and the flow speed of the aluminum liquid is reduced, the inside of the groove 7 is rounded, the depth of the groove 7 is 2-4 times the width of the forming gap 15, the flow speed of the aluminum liquid flowing through the short side of the lower hollow cutter 5 is increased, and corresponds to the flow speed of the aluminum liquid on the long side of the lower hollow cutter 5, so as to balance the overall flow speed of the aluminum liquid, avoid large flow speed difference of the aluminum liquid at different positions, and ensure the production quality of the automobile energy absorption box.

[0037] In one embodiment, the inclination angle of the inclined section 8 is set to 45 degrees, the depth of the welding chamber 10 is greater than 5 mm, the height of the inclined section 8 is equal to the depth of the welding chamber 10, and the height of the upper empty knife 14 is greater than the vertical distance between the inclined section 8 and the cavity 11. The design of the inclined section 8 can also balance the impact force of the aluminum liquid on the lower empty knife 5, so that the strength of the lower empty knife 5 is increased, which is beneficial to the use of the whole die body.

[0038] In one embodiment, the upper die 1 and the lower die 9 are tightly matched into a die body by fasteners, and the assembly mode is set to a reverse check assembly type, which enhances the stability of the upper die 1 and the lower die 9 after assembly, and ensures the integrity of the die body.

[0039] The embodiment is specific: when the utility model is used, the aluminum liquid is divided into four parts at the top of the upper die 1, flows into the inside of the upper die 1 through the four distribution holes 3, and finally recombines in the welding chamber 10 under the guidance of the distribution holes 3, and uniformly flows to the cavity 11, so that the automobile energy absorption box profile is formed under the extrusion of the forming gap 15, and the formed automobile energy absorption box profile is continuously discharged from the die body through the discharge hole 12, so that the hot extrusion production of the automobile energy absorption box profile is completed.

[0040] Specifically, the width of the top of the support body 22 is set to 1 mm, which reduces the contact area of the top of the distribution bridge 2 with the aluminum liquid, that is, the area of the top of the support body 22 impacted by the aluminum liquid is reduced, so that the aluminum liquid can quickly enter the inside of the distribution hole 3, thereby reducing the static point pressure on the upper die 1 to the minimum, greatly reducing the stress on the whole die body, and improving the service life of the die body.

[0041] The design of the arc surface 4 changes the flow space of the aluminum liquid in each distribution hole 3 from large to small and then from small to large, guides the flow path of the aluminum liquid, effectively reduces the friction between the aluminum liquid and the support body 22, and makes the flow of the aluminum liquid smooth and stable. The design of the arc surface 4 can also increase the strength of the support body 22, thereby increasing the overall strength of the die body, and improving the service life of the die body.

[0042] Since the work belt 13 for preparing the automobile energy absorption box is rectangular, and the intermediate body 21 is trapezoidal, when the aluminum liquid flows in the four flow holes 3, the flow rate of the aluminum liquid close to the center of the upper die 1 is greater than that far from the center of the upper die 1, that is, the flow rate of the aluminum liquid on the long side of the lower air knife 5 is greater than that on the short side of the lower air knife 5, so the boss 6 is arranged on the long side of the lower air knife 5, so that the flow path of the aluminum liquid flowing on the long side of the lower air knife 5 is lengthened, thereby reducing the flow rate of the aluminum liquid, at the same time, the two grooves 7 on the short side of the lower air knife 5 make the aluminum liquid flowing through the grooves 7 can smoothly butt joint with the lower air knife 5, compensate the flow rate of the aluminum liquid flowing through the grooves 7, that is, increase the flow rate of the aluminum liquid flowing through the short side of the lower air knife 5, correspond to the flow rate of the aluminum liquid on the long side of the lower air knife 5, reduce the flow rate difference of the aluminum liquid around the lower air knife 5, so that the overall flow rate of the aluminum liquid is balanced and stable, and the aluminum liquid can smoothly transition to the work belt 13, ensuring the production quality of the automobile energy absorption box.

[0043] The setting of the inclined section 8 increases the aluminum liquid capacity at the four corners of the lower air knife 5, ensures sufficient supply of the work belt 13 at the four corners, and there is enough aluminum liquid that can directly flow into the four corners of the work belt 13, ensuring that the aluminum liquid flow at the corner position of the automobile energy absorption box is sufficient and the flow rate is stable, and the design of the inclined section 8 can also balance the impact force of the aluminum liquid on the lower air knife 5, so that the strength of the lower air knife 5 is increased, which is beneficial to the use of the whole mold body.

[0044] The embodiment specifically solves the problem in the prior art that when the hot extrusion die produces the automobile energy absorption box, the aluminum flow has a large impact force on the upper die 1 when flowing into the upper die 1, and the aluminum flow cannot be effectively guided when flowing out through the flow hole 3, and the aluminum flow is difficult to flow smoothly and stably towards the cavity 11, resulting in poor finished product quality of the automobile energy absorption box.

[0045] The above only describes some exemplary embodiments of the present application by way of illustration, without doubt, for ordinary skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present application.

Claims

1. A hot extrusion die for producing a profile of an energy-absorbing box of a motor vehicle, characterized in that: The utility model relates to a split flow bridge (2) is arranged in the upper die (1), and the upper die (1) is provided with a plurality of split flow holes (3) by the split flow bridge (2). The split flow bridge (2) comprises a middle body (21) gradually diffusing outward from top to bottom and being in the shape of a trapezoid as a whole, and a support body (22) connected with the middle body (21), and the inside of the upper die (1) is spaced by the middle body (21) and the support body (22) to form a plurality of split flow holes (3). The middle part of the two side faces of the support body (22) is outwardly convex with an arc face (4), the bottom of the middle body (21) is connected with a lower hollow cutter (5), the front and rear side faces of the middle body (21) are outwardly convex with a boss (6) at the connection with the lower hollow cutter (5), the left and right side faces of the middle body (21) are inwardly recessed with a groove (7) at the connection with the lower hollow cutter (5), and the four corners of the lower hollow cutter (5) are provided with an inclined section (8).

2. A hot extrusion die for producing a profile of an energy absorption box of a vehicle according to claim 1, characterized in that: The top width of the support body (22) is 1mm, and the angle of the arc face (4) is not greater than 60 degrees.

3. A hot extrusion die for producing a profile of an energy absorption box of a vehicle according to claim 1, characterized in that: The utility model also comprises a lower die (9) arranged at the bottom of the upper die (1), the lower die (9) comprises a welding chamber (10) arranged at the top of the lower die (9), a cavity (11) arranged in the inside of the lower die (9) and connected with the welding chamber (10), and a discharge hole (12) arranged at the bottom of the lower die (9) and connected with the cavity (11).

4. A hot extrusion die for producing a profile for a crash box of a vehicle according to claim 3, characterized in that: The bottom of the lower hollow cutter (5) is connected with a working belt (13), which can form a forming gap (15) between the inner wall of the cavity (11) after being inserted into the cavity (11), and is used for extrusion production of an automobile energy absorption box, and the bottom of the working belt (13) is also connected with an upper hollow cutter (14).

5. A hot extrusion die for producing a profile for a crash box of a vehicle according to claim 4, characterized in that: The thickness of the boss (6) is 3-5 times the width of the forming gap (15).

6. A hot extrusion die for producing a profile of an energy absorption box of a vehicle according to claim 4, characterized in that: The inside of the groove (7) is rounded, and the depth of the groove (7) is 2-4 times the width of the forming gap (15).

7. A hot extrusion die for producing a profile of an energy absorption box of an automobile according to claim 4, characterized in that: The angle of the inclined section (8) is 45 degrees, the depth of the welding chamber (10) is greater than 5mm, the height of the inclined section (8) is equal to the depth of the welding chamber (10), and the height of the upper hollow cutter (14) is greater than the vertical distance between the inclined section (8) and the cavity (11).

8. A hot extrusion die for producing a profile of an energy absorption box of an automobile according to claim 3, characterized in that: The upper die (1) and the lower die (9) are tightly matched into a die by fasteners, and the assembly mode is a return port assembly type.

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