Fender mold for vehicle and vehicle production line

Abstract

The utility model relates to the technical field of vehicle manufacturing, in particular to a fender die for a vehicle and a vehicle production line, and aims to solve the problem that stress concentration easily occurs on a pressure plate gap bridge in the existing vehicle fender trimming process, so that the die cracks. In order to achieve the purpose, the fender mold for the vehicle is provided with a structural rib, the structural rib comprises a gap bridge rib, and the gap bridge rib is provided with an ejector block protrusion used for installing an ejector block. According to the utility model, the ejection block groove on the gap bridge rib of the existing vehicle fender die is improved into the ejection block bulge, so that a stress concentration point is prevented from being generated in the ejection block groove, and the fender die is ensured not to crack, thereby ensuring the continuous and stable mass production capacity on a production line in the vehicle production process, and improving the production efficiency. The existing problems are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, and specifically provides a fender mould for a vehicle and a vehicle production line. Background Art

[0002] In the vehicle production process, how to continuously and stably improve the mass production capacity of automobile exterior stamping parts is a common problem currently faced by automobile manufacturers. Among them, mold cracking caused by insufficient mold structure strength is a common emergency problem that affects production line shutdown.

[0003] Taking fender production as an example, mold cracking often occurs during the fender production process. By comparing the mold structures of other models horizontally, we find the difference that affects mold cracking. The difference is that a nitrogen bar is set on the bridge of the pressure plate casting in the fender trimming process, and a top block groove is set for the nitrogen bar. The right angle of the groove is at the stress concentration point, which causes cracks to be generated from the stress concentration point. Therefore, how to avoid stress concentration on the pressure plate bridge in the fender trimming process that causes mold cracking has become a technical problem that needs to be solved urgently in this field.

[0004] In view of this, the art needs to propose a new fender mold for a vehicle and a vehicle production line to solve the existing problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem that stress concentration is easy to occur on the bridge of the pressing plate in the existing vehicle fender trimming process, resulting in mold cracking.

[0006] In a first aspect, the utility model provides a fender mold for a vehicle, wherein the fender mold is provided with structural ribs, wherein the structural ribs include bridge ribs, and wherein the bridge ribs are provided with top block protrusions for installing top blocks.

[0007] In a specific embodiment of the above-mentioned fender mold for a vehicle, the structural ribs further include reinforcing ribs, and the reinforcing ribs are provided with top block protrusions for mounting the top block.

[0008] In a specific embodiment of the above-mentioned fender mold for a vehicle, the structural ribs further include reinforcing ribs, and the reinforcing ribs are provided with top block grooves for mounting the top blocks.

[0009] In a specific embodiment of the above-mentioned fender mold for a vehicle, the material of the structural rib is one of gray cast iron and ductile iron.

[0010] In a specific embodiment of the above-mentioned fender panel mold for a vehicle, the thickness of the structural rib is greater than or equal to 50 mm.

[0011] In a specific embodiment of the fender mold for a vehicle, the top block groove is hemispherical, and correspondingly the top block is hemispherical, and the top block can be embedded in the top block groove.

[0012] In a specific embodiment of the fender mold for a vehicle, a rounded corner is provided between the bottom surface and the side surface of the top block groove.

[0013] In the above-mentioned specific implementation of the fender mold for a vehicle, the surface of the structural rib is shot peened, rolled or nitrided to improve the fatigue strength of the surface of the structural rib.

[0014] In a specific embodiment of the above-mentioned fender mold for a vehicle, the radius of the fillet is greater than or equal to 3 mm.

[0015] The utility model also provides a vehicle production line, and the vehicle production line comprises a fender mold for a vehicle described in any one of the above technical solutions.

[0016] When the above technical scheme is adopted, compared with the form of setting a top block groove on the bridge rib of the fender mold in the prior art, the fender mold for a vehicle of the utility model improves the top block groove on the bridge rib into a top block protrusion, thereby enhancing the structural strength of the bridge rib and avoiding the stress concentration point on the bridge rib, thereby ensuring that the fender mold will not crack, solving the problem of stress concentration on the bridge of the pressing plate in the existing vehicle fender trimming process, which leads to mold cracking, and ensuring the continuous and stable mass production capacity on the production line during the vehicle production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0018] Figure 1 is a schematic diagram of an existing fender mold;

[0019] Figure 2 This is a partial enlarged view of the existing fender mold, where Figure 2 yes Figure 1 A in the middle;

[0020] Figure 3 A schematic diagram of a fender mold in a possible implementation manner of the utility model;

[0021] Figure 4 is a partial enlarged view of a fender mold in one embodiment of the utility model, wherein Figure 4 yes Figure 3 At point B in the middle.

[0022] List of reference numerals:

[0023] 1- Fender mold;

[0024] 11-bridge tendons;

[0025] 12-Reinforcement ribs;

[0026] 13-top block protrusion;

[0027] 14-top block groove;

[0028] 2- Top block. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0030] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In addition, it should be noted that in the description of the present invention, 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0032] First, the existing fender mold 1 is described.

[0033] like Figure 1 , Figure 2As shown, during the production process, the fender of the vehicle needs to be stamped through the fender mold 1 and the pressure plates on the upper and lower sides (not shown in the figure), and a nitrogen pump (not shown in the figure) is used to realize stamping. Therefore, it is necessary to set a nitrogen pump top block 2 on the fender mold 1. In order to achieve the fixation of the top block 2, the existing fender mold 1 usually sets a top block groove 14 on the bridge rib 11. However, in the actual production process of the fender, the fender mold 1 often cracks at the top block groove 14. By comparing the mold structures of other models horizontally, the difference points that affect the cracking of the mold are found. It is found that the right angle of the bottom surface of the top block groove 14 is at the stress concentration point, which causes cracks to be generated from the stress concentration point. Therefore, how to avoid stress concentration on the bridge of the pressure plate in the fender trimming process to cause mold cracking has become a technical problem that needs to be solved urgently in this field.

[0034] Embodiment 1

[0035] like Figure 3 , Figure 4 As shown, in order to solve the problem that stress concentration is easy to occur on the press plate bridge in the existing vehicle fender trimming process, resulting in mold cracking, the utility model is provided with structural ribs on the vehicle fender mold 1, and the structural ribs include bridge ribs 11 and reinforcing ribs 12. The reinforcing ribs 12 are arranged at both ends of the bridge ribs 11, and the lower part of the reinforcing ribs 12 is in contact with the lower press plate, and the lower part of the bridge ribs 11 is suspended. A top block protrusion 13 ( Figure 3 , Figure 4 A schematic diagram showing the top block protrusion 13 being arranged on the reinforcing rib 12 is shown for reference).

[0036] When the above-mentioned embodiment is adopted, during the process of stamping using the fender mold 1 of the utility model, the upper end of the nitrogen pump is connected to the upper pressure plate, and the lower end of the nitrogen pump abuts against the top block 2 placed on the top block protrusion 13. The force of the nitrogen pump on the top block 2 acts on the top block protrusion 13 of the bridge rib 11 through the top block 2, and acts on the entire bridge rib 11 through the top block protrusion 13. Since the end of the bridge rib 11 is connected to the reinforcing rib 12, the force of the nitrogen pump is transmitted to the reinforcing rib 12 after passing through the bridge rib 11, and then acts on the lower pressure plate.

[0037] The advantage of the above-mentioned setting method is that, unlike the method of setting a top block groove 14 on the bridge rib 11 of the fender mold 1 in the prior art, the fender mold 1 of the utility model improves the top block groove 14 into a top block protrusion 13. Since the height of the bridge rib 11 at the groove is less than the height of the bridge rib 11 at the groove is not set, the structural strength of the bridge rib 11 at the groove is reduced, and the stress concentration at the right angle of the bottom surface of the groove is likely to cause cracking at the groove. In this embodiment, the top block groove 14 is improved into a top block protrusion 13, and the top block 2 is placed on the top block protrusion 13. Since the height of the top block protrusion 13 is increased, the structural strength of the top block protrusion 13 is higher, so that when the force of the nitrogen pump acts on the top block 2, it is less likely to cause mold cracking due to stress concentration, thereby solving the existing problem.

[0038] Embodiment 2

[0039] It is mentioned above that the structural strength is enhanced by improving the top block groove 14 on the fender mold 1 in the prior art into a top block protrusion 13 to avoid the mold cracking. Although this solution has a good effect, since the lower part of the bridge rib 11 is suspended in the air, the structural strength of the bridge rib 11 is limited, and cracking may still occur on the bridge rib 11. In view of this, the present embodiment is proposed. It is mentioned above that the structural ribs on the fender mold 1 include the bridge rib 11 and the reinforcing rib 12, such as Figure 3 , Figure 4 As shown, different from the aforementioned first embodiment, in this embodiment, the top block protrusion 13 is arranged on the reinforcing rib 12.

[0040] When the above-mentioned embodiment is adopted, since the bottom of the reinforcing rib 12 is in contact with the lower pressure plate, the structural strength of the reinforcing rib 12 is higher. During the stamping process using the fender mold 1 of the utility model, the force of the nitrogen pump on the top block 2 acts on the top block protrusion 13 of the reinforcing rib 12 through the top block 2, and acts on the entire reinforcing rib 12 through the top block protrusion 13, and then acts on the lower pressure plate.

[0041] The advantage of the above embodiment is that compared with the method of setting the top block protrusion 13 on the bridge rib 11 in Example 1, the top block protrusion 13 is chosen to be set on the reinforcing rib 12 with higher strength in this embodiment, thereby further improving the structural strength of the top block protrusion 13 and avoiding the mold cracking due to stress concentration.

[0042] It can be understood by those skilled in the art that, in combination with the aforementioned embodiments, the structural strength of the top block groove 14 or the top block protrusion 13 provided on the bridge rib 11 is not as good as that of the top block groove 14 or the top block protrusion 13 provided on the reinforcing rib 12. At the same time, the structural strength of the top block groove 14 is not as good as that of the top block protrusion 13. In combination with the above reasons, this embodiment is proposed. In this embodiment, those skilled in the art can also provide a top block groove 14 for mounting the top block 2 on the reinforcing rib 12.

[0043] In the case of adopting the above-mentioned embodiment, although compared with the method of setting the top block protrusion 13 on the reinforcing rib 12, the structural strength of the top block 2 in this embodiment is smaller, but since the structural strength of the reinforcing rib 12 itself is high enough, the solution of setting the top block groove 14 on the reinforcing rib 12 can also meet the strength requirements of the nitrogen pump for the top block 2. Based on this, this embodiment is also a feasible implementation scheme, and compared with setting the top block protrusion 13, setting the top block groove 14 occupies less space in the vertical direction. Technicians in this field can reasonably select various implementation schemes according to actual needs.

[0044] Furthermore, in a possible implementation, a person skilled in the art may configure the top block groove 14 on the reinforcing rib 12 to be hemispherical, and accordingly configure the top block 2 to be hemispherical, so that the top block 2 can be embedded in the top block groove 14 .

[0045] The top block groove 14 on the existing fender mold 1 has a small angle between the bottom surface of the groove and the side surface of the groove (usually a right angle of 90°), which makes it easy for a stress concentration point to appear at the right angle of the groove, thereby causing cracks in the groove. In order to avoid this situation, the present embodiment is proposed. When the present embodiment is adopted, the top block groove 14 on the reinforcing rib 12 is set to a hemispherical shape, and the top block 2 is also set to a hemispherical shape accordingly. When installing the top block 2, the top block 2 can be embedded in the top block groove 14. The scheme of the present embodiment increases the radius of the transition arc between the bottom surface and the side surface of the top block groove 14, thereby reducing the possibility of stress concentration points appearing in the groove, thereby ensuring that the fender mold 1 will not crack, ensuring the continuous and stable mass production capacity on the production line during vehicle production, and solving the existing problems.

[0046] In addition, in a possible implementation, a person skilled in the art may also set a fillet between the bottom and side surfaces of the top block groove 14. Similar to the technical principle mentioned above, by increasing the radius of the transition arc between the bottom and side surfaces of the top block groove 14, the possibility of stress concentration points appearing in the groove is reduced, thereby ensuring that the fender mold 1 will not crack, ensuring the continuous and stable mass production capacity of the production line during vehicle production, and solving the existing problems. It is also worth mentioning that in order to ensure that the fillet can relieve stress concentration, the radius of the fillet should be greater than or equal to 3mm. Of course, the above is only an exemplary division of the range of the radius of the fillet. A person skilled in the art may also set the radius of the fillet in the top block groove 14 according to the size of the top block groove 14 on the fender mold 1 in actual situations, as long as it is greater than or equal to 3mm. These changes do not exceed the technical principle of the present invention, and therefore will be included in the protection scope of the present invention.

[0047] In a possible implementation manner, the material of the structural ribs on the fender mold 1 is gray cast iron or ductile iron.

[0048] The advantages of the above embodiment are: ductile iron has high strength, high toughness and good plasticity and forgeability. Ductile iron has high tensile strength and excellent toughness, wear resistance and corrosion resistance. Gray cast iron has relatively low strength but good wear resistance, rust resistance and shock resistance. The high strength, high ductility and good fatigue resistance of ductile iron enable it to be used in the manufacture of working parts that need to bear heavy loads and high stresses. The brittleness, low strength, low ductility and low corrosion resistance of gray cast iron make it more suitable for the production of some parts that do not require strength and toughness. Since the production process of ductile iron is more complicated, its price is relatively high, while the price of gray cast iron is relatively cheap. Those skilled in the art can make a choice according to actual needs, and these changes are all within the protection scope of the present utility model.

[0049] In a possible implementation manner, the thickness of the structural ribs on the fender mold 1 is greater than or equal to 50 mm.

[0050] The advantage of the above-mentioned arrangement is that: the above-mentioned scheme of increasing the height of the structural ribs by improving the top block groove 14 on the bridge rib 11 in the prior art into a top block protrusion 13, thereby improving the structural strength of the structural ribs, on this basis, this embodiment is proposed to further improve the strength of the structural ribs. In the case of adopting the above-mentioned embodiment, the structural strength of the structural ribs is further improved by increasing the thickness of the structural ribs to be greater than or equal to 50 mm, so that even if stress concentration occurs on the structural ribs, cracking will not occur because the structural strength of the structural ribs themselves is large enough, thereby solving the existing problem. In addition, it can be understood by those skilled in the art that the above-mentioned range of the thickness of the structural ribs is only an exemplary division, and those skilled in the art can set a suitable thickness of the structural ribs within this range based on actual conditions, and these changes are all within the scope of protection of the present utility model.

[0051] In a possible implementation manner, those skilled in the art may also perform shot peening, rolling or nitriding treatment on the surface of the structural ribs.

[0052] The advantages of the above implementation methods are: Shot peening, also known as shot peening strengthening, is one of the effective methods to reduce part fatigue and increase service life. Shot peening is to spray a high-speed projectile stream onto the surface of the part to cause plastic deformation of the surface layer of the part and form a strengthening layer of a certain thickness. A higher residual stress is formed in the strengthening layer. Due to the existence of compressive stress on the surface of the part, part of the stress can be offset when the part is under load, thereby improving the fatigue strength of the part. Rolling treatment utilizes the cold plasticity of metal at room temperature, and uses a rolling tool to apply a certain pressure to the surface of the workpiece, so that the surface metal of the workpiece produces plastic flow and fills into the original residual concave trough, thereby reducing the surface roughness of the workpiece. Due to the plastic deformation of the rolled surface metal, the surface structure is cold hardened and the grains are refined, forming a dense fibrous shape, and a residual stress layer is formed, the hardness and strength are improved, thereby improving the wear resistance, corrosion resistance and compatibility of the workpiece surface. Nitriding treatment refers to a chemical heat treatment process that allows nitrogen atoms to penetrate into the surface of a workpiece in a certain medium at a certain temperature. Products treated with nitriding have excellent wear resistance, fatigue resistance, corrosion resistance and high temperature resistance. Those skilled in the art can perform the above-mentioned process on structural ribs according to actual needs, and these are within the scope of protection of this utility model.

[0053] It should be noted that the above-mentioned implementation mode is only used to illustrate the principle of the utility model, and is not intended to limit the protection scope of the utility model. Without departing from the principle of the utility model, those skilled in the art can adjust the above-mentioned structure so that the utility model can be applied to more specific application scenarios.

[0054] In addition, the utility model also provides a vehicle production line, which has the fender mold 1 for a vehicle mentioned in any of the above embodiments, and can produce vehicle fenders through the fender mold 1.

[0055] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A fender mold for a vehicle, wherein the fender mold is provided with structural ribs, wherein the structural ribs include bridge ribs, and wherein: The bridge rib is provided with a top block protrusion for installing a top block.

2. The fender mold for a vehicle according to claim 1, characterized in that: The structural ribs also include reinforcing ribs, and the reinforcing ribs are provided with top block protrusions for mounting the top blocks.

3. The fender mold for a vehicle according to claim 1, characterized in that: The structural ribs also include reinforcing ribs, and the reinforcing ribs are provided with top block grooves for mounting top blocks.

4. The fender mold for a vehicle according to claim 1, characterized in that: The structural ribs are made of grey cast iron or ductile iron.

5. The fender mold for a vehicle according to claim 1, characterized in that: The thickness of the structural rib is greater than or equal to 50 mm.

6. The fender mold for a vehicle according to claim 3, characterized in that: The top block groove is hemispherical, and correspondingly the top block is hemispherical, and the top block can be embedded in the top block groove.

7. The fender mold for a vehicle according to claim 5, characterized in that: A rounded corner is arranged between the bottom surface and the side surface of the top block groove.

8. The fender mold for a vehicle according to any one of claims 1 to 3, characterized in that: The surface of the structural rib is shot peened, rolled or nitrided to improve the fatigue strength of the surface of the structural rib.

9. The fender mold for a vehicle according to claim 7, characterized in that: The radius of the fillet is greater than or equal to 3 mm.

10. A vehicle production line, characterized in that: The vehicle production line comprises the fender mold for a vehicle according to any one of claims 1-9.

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