Hot extrusion die for thick and thin solid materials of automobile front frame profile

Abstract

The utility model discloses a hot extrusion die for thick and thin solid materials of an automobile front frame profile, and belongs to the technical field of aluminum extrusion dies. The mold comprises an upper mold body, and the upper mold body comprises a feeding face, a flow dividing hole and a flow dividing bridge. And the lower die comprises a welding chamber, a flow guide pit, a cavity and a discharging opening formed in one side of an outlet of the cavity. According to the hot extrusion die for the thick and thin solid materials of the front frame profile of the automobile, the mode that the large flow dividing holes and the small flow dividing holes are combined and matched for feeding is adopted, accurate flow control over areas with different wall thicknesses can be achieved, the large flow dividing holes are used for feeding in thin-wall areas, and the small flow dividing holes are used for feeding in thick-wall areas; by means of the design, the problem that a traditional die is uneven in discharging under the condition that the wall thickness difference is large is effectively solved, and therefore the appearance and performance stability of a product are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to aluminium extrusion die technical field, especially a kind of for the hot extrusion die of automobile front frame section bar thick and thin solid material. BACKGROUND

[0002] With the rapid development of automobile industry, the materials and manufacturing processes of automobile parts are facing higher and higher requirements, among which, as an important part of automobile structure, the application of thick and thin solid material of front frame section bar is increasing, however, the characteristics of great difference in thick and thin of front frame automobile section bar bring many problems to the production process.

[0003] Firstly, the wall thickness of front frame section bar has great difference, which leads to difficulty in ensuring the synchronization of thick and thin areas in the hot extrusion process, specifically, the extrusion speed of thick wall area is often faster than that of thin wall area, which may cause uneven discharge, and further affect the appearance and performance of the product. In addition, the traditional die design often cannot effectively solve this problem, because it does not fully consider the influence of thick and thin difference on flow distribution in hole arrangement design; secondly, the existing control method mainly depends on the design of water blocking block and false mold core, but when facing section bar with great difference in thick and thin, the control effect of these methods is not ideal, the water blocking block can slow down the flow of fluid in thick wall part, but its effect is significantly limited for parts with large thick-thin ratio, and it is difficult to effectively slow down the flow rate of fluid in thick wall area, while the use of false mold core scheme may lead to insufficient feeding, thereby causing strength problems such as material cracking, which not only affects the quality of the product, but also increases the production cost. Therefore, an innovative die design scheme is needed to solve the problem of different synchronization of thick and thin discharge, improve the production efficiency and product quality of front frame section bar, and for this purpose, we propose a hot extrusion die for thick and thin solid material of automobile front frame section bar. SUMMARY

[0004] The utility model aims at providing a hot extrusion die for thick and thin solid material of automobile front frame section bar to improve the existing hot extrusion die for processing thick and thin solid material of front frame, and the obvious deficiency in flow control and discharge uniformity.

[0005] To solve the above technical problems, the utility model provides a hot extrusion die for thick and thin solid material of automobile front frame section bar, which comprises an upper die, the upper die comprises a feeding surface, a plurality of shunt holes penetrating the middle part of the feeding surface, and a shunt bridge arranged between the shunt holes.

[0006] A lower die, the lower die comprises a welding chamber, a flow guide pit arranged on one side of the welding chamber, a cavity opened in the flow guide pit and penetrating the lower die, and a discharge port arranged on one side of the cavity outlet.

[0007] Preferably, the flow distribution hole includes a combination of large flow distribution holes and small flow distribution holes.

[0008] Preferably, the flow guide pit includes a first flow guide pit, and a second flow guide pit arranged on one side of the first flow guide pit.

[0009] The first flow guide pit is 3mm deeper than the second flow guide pit.

[0010] Preferably, the cavity includes a thin-walled area and a thick-walled area.

[0011] Preferably, the thin-walled area is located in the first flow guide pit.

[0012] The thick-walled area is located in the second flow guide pit.

[0013] Preferably, the thin-walled area is supplied by large flow distribution holes, and the thick-walled area is supplied by small flow distribution holes, so as to accurately control the flow.

[0014] Preferably, the discharge port is a stepped outlet consistent with the shape of the profile.

[0015] Compared with the prior art, the design scheme of the hot extrusion die for the automobile front frame profile thick-thin solid material of the utility model adopts the combination of large flow distribution holes and small flow distribution holes for feeding, and has the following beneficial effects:

[0016] 1. The accurate flow control of different wall thickness areas can be realized. The thin-walled area is supplied by large flow distribution holes, and the thick-walled area is supplied by small flow distribution holes, so that the discharge speed of the thick-thin area is synchronized in the hot extrusion process. This design effectively solves the problem of uneven discharge of the traditional die in the case of large wall thickness difference, thereby improving the appearance and performance stability of the product.

[0017] 2. Since the design scheme avoids using a false mold core, the material cracking problem caused by insufficient feeding is reduced, the feeding of the thick-walled area is ensured, and the flow control is accurate, so that the extruded profile has better performance. Not only is the material sufficient and false appearance is not easy to appear, but also the phenomena of fast and slow control and size control are solved, and the overall performance of the final product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a profile schematic diagram processed by the hot extrusion die for the automobile front frame profile thick-thin solid material of the utility model;

[0019] Figure 2 is a whole structure diagram of the hot extrusion die for the automobile front frame profile thick-thin solid material of the utility model;

[0020] Figure 3The utility model provides a cross section view for automobile front frame section bar thick thin solid material hot extrusion die,

[0021] Figure 4 The utility model provides a shunt hole arrangement drawing for automobile front frame section bar thick thin solid material hot extrusion die,

[0022] In the drawing: 1, upper die, 101, feed face, 102, shunt hole, 102a, big shunt hole, 102b, small shunt hole, 103, shunt bridge, 2, lower die, 201, weld chamber, 202, flow guide pit, 202a, first flow guide pit, 202b, second flow guide pit, 203, cavity, 203a, thin wall area, 203b, thick wall area, 204, discharge port. DETAILED DESCRIPTION

[0023] The utility model makes further detailed description in combination with the drawings and specific embodiment. According to the following description and claims, the advantages and features of the utility model will be more clear. 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 describing the embodiment of the utility model.

[0024] 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, a particular orientation and operation, and therefore cannot be understood as a limitation on 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 be explicitly or implicitly included one or more. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0025] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, 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 between 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

[0026] The utility model provides a kind of for automobile front frame section bar thick solid material hot extrusion die, please refer to Figures 1-4 Including upper die 1, the upper die 1 includes feed surface 101, multiple shunt holes 102 being passed in the middle part of the feed surface 101, and shunt bridge 103 being arranged between the shunt hole 102;Lower die 2, the lower die 2 includes welding chamber 201, is arranged in the flow guide pit 202 of welding chamber 201 one side, is opened in the flow guide pit 202 and is passed through the cavity 203 of lower die 2, and is arranged in the cavity 203 export one side of discharge port 204.

[0027] The shunt hole 102 includes large shunt hole 102a and small shunt hole 102b combination and is matched with feeding mode to feed;The flow guide pit 202 includes first flow guide pit 202a, and second flow guide pit 202b being arranged in the first flow guide pit 202a side;The depth of first flow guide pit 202a is 3mm than second flow guide pit sinks;The cavity 203 includes thin-walled area 203a and thick-walled area 203b;The thin-walled area 203a is located in first flow guide pit 202a;The thick-walled area 203b is located in second flow guide pit 202b;The thin-walled area 203a uses large shunt hole 102a to feed, and the thick-walled area 203b uses small shunt hole 102b to feed, and accurately controls flow;The discharge port 204 is the stepped outlet consistent with the shape of section bar.

[0028] It needs to be explained that the whole mold adopts H13 die steel, and the specific material is 4Cr5MoSiV1, the upper die 1 is matched with the lower die 2 through welding chamber 201, and is connected by bolt through four corner bolt holes, to form a complete extrusion channel, after aluminum liquid enters from feed surface 101, is shunted to the flow guide pit 202 of lower die 2 through shunt hole 102, flows into cavity 203 through flow guide pit 202, and is finally discharged through discharge port 204.

[0029] Preferably, the feed surface 101 is the top surface of the upper die, responsible for the feeding of aluminum liquid, and the feed surface 101 is designed as a plane to ensure uniform distribution of aluminum liquid flowing in, so that the large shunt hole 102a and the small shunt hole 102b feed according to the area ratio, the shunt hole 102 functions to shunt the aluminum liquid to different areas of the lower die 2 to realize the production of section bars of different thicknesses, the large shunt hole 102a is used for feeding the thin-walled area 203a, and the small shunt hole 102b is used for feeding the thick-walled area 203b, in the present embodiment, there is one small shunt hole 102b and six large shunt holes 102a, which are distributed around the small shunt hole 102b according to the position of the section bar model.

[0030] Preferably, the flow guide pit 202 is arranged on one side of the welding chamber 201 and is divided into a first flow guide pit 202a and a second flow guide pit 202b. The first flow guide pit 202a is 3mm deeper than the second flow guide pit 202b, which functions to guide the aluminum material into the cavity 203 and control the flow speed and pressure of the aluminum material according to different depths. The first flow guide pit 202a is mainly responsible for the aluminum material supply of the thin-wall area 203a, while the second flow guide pit 202b is responsible for the aluminum material supply of the thick-wall area 203b. The first flow guide pit 202a and the second flow guide pit 202b are connected through a bevel transition, and the cross section of the bevel is a slope.

[0031] Preferably, the cavity 203 penetrates the flow guide pit 202, and the cavity 203 is designed according to the cross-sectional shape of the profile, and the thin-wall area 203a and the thick-wall area 203b are divided according to the thickness of the profile, as shown in the drawing. Figure 2 In this embodiment, the thickness change can be clearly observed, and in some embodiments in which the thickness of the cavity 203 changes irregularly, multiple flow guide pits 202 with different depths can be added to adjust the flow rate of the aluminum material to ensure uniform discharge of the aluminum material.

[0032] Preferably, the stepped discharge port 204 can ensure that the shape of the extruded profile is consistent with the design requirements. Since the shape of the discharge port matches the cross section of the profile, the deformation of the profile during the discharging process can be effectively reduced, and the dimensional accuracy of the finished product can be ensured.

[0033] In summary, the hot extrusion die for the automobile front frame profile thick-thin solid material of the utility model adopts the feeding mode of large and small shunt holes combined and matched, which can realize accurate flow control of different wall thickness areas. The thin-wall area uses large shunt holes for feeding, and the thick-wall area uses small shunt holes for feeding, so that the discharge speed of the thick-thin area can be synchronized during hot extrusion. This design effectively solves the problem of uneven discharge of traditional molds in the case of large wall thickness difference, thereby improving the appearance and performance stability of the product. In addition, since the design scheme avoids the use of a false mold core, the material cracking problem caused by insufficient feeding is reduced, and sufficient feeding of the thick-wall area is ensured.

[0034] The above description is only a description of the preferred embodiment of the utility model, and does not limit the scope of the utility model. Any changes and modifications made by ordinary skilled persons in the art according to the above disclosure are within the protection scope of the claims.

Claims

1. A hot extrusion die for thick and thin solid materials of automobile front frame profiles, characterized in that: The utility model relates to a kind of extrusion molding machine, including, Upper die (1), the upper die (1) includes feed surface (101), multiple shunt holes (102) are passed through in the middle part of the feed surface (101), and shunt bridge (103) is arranged between the shunt hole (102); Lower die (2), the lower die (2) includes welding chamber (201), flow guide pit (202) is arranged in the welding chamber (201) one side, the cavity (203) is opened in the flow guide pit (202) and is passed through lower die (2), and discharge port (204) is arranged in the cavity (203) export one side.

2. A hot extrusion die for thick-thin solid section of automobile front frame profile according to claim 1, characterized in that, The shunt hole (102) includes large shunt hole (102a) and small shunt hole (102b) combination collocation feeding mode feeding.

3. A hot extrusion die for thick-thin solid section of automobile front frame profile as claimed in claim 2, wherein, the die is characterized by, The flow guide pit (202) includes first flow guide pit (202a), and second flow guide pit (202b) is arranged in the first flow guide pit (202a) one side; The first flow guide pit (202a) depth is compared with second flow guide pit sinks 3mm.

4. A hot extrusion die for thick-thin solid section of automobile front frame profile according to claim 3, characterized in that, The cavity (203) includes thin-walled area (203a) and thick-walled area (203b).

5. A hot extrusion die for thick-thin solid section of automobile front frame profile as claimed in claim 4, wherein, The thin-walled area (203a) is located first flow guide pit (202a); The thick-walled area (203b) is located second flow guide pit (202b).

6. A hot extrusion die for thick-thin solid section of automobile front frame profile as claimed in claim 4, wherein, The thin-walled area (203a) uses large shunt hole (102a) and feeds, and the thick-walled area (203b) uses small shunt hole (102b) and feeds, accurately controls flow.

7. A hot extrusion die for thick-thin solid section of automobile front frame profile as claimed in claim 1, wherein, The discharge port (204) is the stepped outlet consistent with the shape of profile.

Images