Aluminum foil pre-pressing trimming die for automobile parts

Abstract

The invention relates to an automobile part aluminum foil pre-pressing trimming die which comprises an upper die and a lower die, the upper die and the lower die are both provided with part boundaries, the upper die and the lower die are matched with each other, and an aluminum foil is placed on the lower die; a pre-pressing block and a pre-bayonet are embedded in the upper die, the pre-pressing block is installed on the upper die in a sliding mode, and the sliding direction is perpendicular to the aluminum foil. The pre-bayonet is located on the part boundary and extends out of the upper die, and the height of the pre-bayonet is larger than that of the highest point on the upper die. Compared with the prior art, the pre-pressing device has the advantages that the pre-pressing block and the pre-bayonet are mounted on the upper die, when the upper die and the lower die are closed, the pre-pressing block extends out to press the aluminum foil, the pre-bayonet pierces the aluminum foil, the aluminum foil is effectively prevented from being torn, other procedures are not needed, and operation is convenient and fast.

Description

TECHNICAL FIELD

[0001] The application relates to an automobile part processing die, in particular to an automobile part aluminum foil pre-pressing and edge cutting die. BACKGROUND

[0002] In the field of automobile manufacturing, the core role of aluminum foil pasting of automobile parts is heat insulation and electromagnetic interference shielding, and in specific scenarios, it can also play an auxiliary role of rust prevention and light reflection. Aluminum foil can effectively block heat transfer to surrounding precision components, avoiding accelerated aging, performance degradation and even safety hazards caused by high temperature, and ensuring stable operation of the vehicle thermal management system. Aluminum foil can form an electromagnetic shielding layer to block external electromagnetic signals and internal component signal interference, prevent electronic devices from misjudging and malfunctioning, and ensure driving safety and reliable implementation of intelligent functions.

[0003] The prerequisite for realizing the above functions is the perfect combination of aluminum foil and parts, which puts strict requirements on the pre-pressing process. The aluminum foil must be accurately formed according to the three-dimensional profile of the matched parts during the pre-pressing stage to ensure that the shape and size are completely consistent with the parts. If the pre-pressed aluminum foil is damaged, wrinkled, or deviates from the shape of the parts, the overall performance and service life of the parts cannot meet the quality standards of automobile manufacturing.

[0004] After searching, the application publication number CN116078920A discloses a device and method for avoiding aluminum foil rupture on the surface of sound insulation pad parts, specifically discloses: the device includes a pre-pressing block and a pre-forming lower die arranged below the pre-pressing block, the top of the pre-pressing block is connected with a cylinder for driving its up and down movement, and the cylinder is installed on the top fixed plate; the method is to pre-press the aluminum foil, and the aluminum foil is formed into the required characteristic shape in advance, and a stretching allowance is reserved in advance in the characteristic area with large drop and serious stretching. However, the prior art needs to pre-press the aluminum foil, which increases the process and is complicated to operate.

[0005] In summary, how to design an automobile part aluminum foil pre-pressing and edge cutting die that can improve the forming precision of aluminum foil and is convenient to operate is a technical problem to be solved. SUMMARY

[0006] The purpose of the present application is to overcome the defects of the prior art, such as complicated operation, and provide an automobile part aluminum foil pre-pressing and edge cutting die.

[0007] The purpose of the present application can be achieved by the following technical solutions.

[0008] According to one aspect of the present application, there is provided an automobile part aluminum foil pre-pressing and trimming die, comprising an upper die and a lower die, the upper die and the lower die each having a part boundary line, the upper die and the lower die being matched with each other, and the aluminum foil being placed on the lower die; the upper die is embedded with a pre-pressing block and a pre-bayonet, the pre-pressing block being slidingly installed on the upper die, and the sliding direction being perpendicular to the aluminum foil; the pre-bayonet is located on the part boundary line and extends to the outside of the upper die, and the height of the pre-bayonet is higher than the height of the highest point on the upper die.

[0009] As a preferred technical solution, the lower die is provided with a knife rest, and the pre-bayonet extends through the aluminum foil and into the knife rest.

[0010] As a preferred technical solution, the lower die comprises a plurality of blocks, and the gaps between the blocks are part boundary lines, the pre-bayonet is located on the part boundary line in the middle of the upper die, and the knife rest is installed in the gap in the middle of the lower die.

[0011] As a preferred technical solution, the pre-bayonet is triangular, one of the angles of which extends to the outside of the upper die and has a height higher than the height of the highest point on the upper die.

[0012] As a preferred technical solution, a spring is installed between the pre-pressing block and the upper die, and the extension direction of the spring is perpendicular to the aluminum foil; when the spring is in a free state, the height of the pre-pressing block is higher than the height of the pre-bayonet.

[0013] As a preferred technical solution, the pre-pressing block is a plurality of blocks, which are arranged at positions close to different boundary lines, respectively.

[0014] As a preferred technical solution, an aluminum foil positioning baffle is installed around the lower die, and the height of the aluminum foil positioning baffle is higher than the height of the highest point on the lower die.

[0015] As a preferred technical solution, the edge of the upper die is provided with a receiving groove, and when the upper die and the lower die are matched with each other, the aluminum foil positioning baffle is located in the receiving groove.

[0016] As a preferred technical solution, the edge of the lower die close to the upper die is a cutting edge.

[0017] As a preferred technical solution, the upper die is further embedded with an ejection block.

[0018] Compared with the prior art, the present application has the following beneficial effects.

[0019] 1) The pre-pressing block and the pre-bayonet are installed on the upper die, and when the upper die and the lower die are matched, the pre-pressing block extends to press the aluminum foil, and the pre-bayonet pierces the aluminum foil, which can effectively avoid tearing of the aluminum foil; no other process is required, and the operation is convenient.

[0020] 2) The present application installs the tool rest on the lower mold, which can effectively isolate the mold and the pre-bayonet, prevent the blade from being damaged by knocking, and prolong the service life of the pre-bayonet. The pre-bayonet and the tool rest are installed in the middle of the mold, that is, the middle of the aluminum foil. The middle of the aluminum foil is farthest from the edge of the aluminum foil, and is most prone to tearing due to large deformation. The installation of the pre-bayonet can maximize the guarantee of the aluminum foil without tearing.

[0021] 3) The pre-bayonet of the present application is triangular, one corner first contacts the aluminum foil, and the tip angle has a larger pressure, which facilitates rapid cutting of the aluminum foil and does not cause severe deformation of the aluminum foil; as the upper mold gradually descends, the contact length of the pre-bayonet with the aluminum foil gradually increases, and the length of the aluminum foil cut increases, adapting to the gradually increasing deformation of the aluminum foil during the forming process of the mold.

[0022] 4) The spring is installed between the pre-pressing block and the upper mold, which can control the extension stroke range of the pre-pressing block. When the spring is in a free state, the height of the pre-pressing block is higher than the height of the pre-bayonet, which ensures that the pre-pressing block presses the aluminum foil to prevent the aluminum foil from moving before the pre-bayonet pierces the aluminum foil.

[0023] 5) The present application arranges multiple pre-pressing blocks near different boundary lines, which can exert pressure more uniformly and prevent tearing of the aluminum foil caused by uneven stress.

[0024] 6) The present application installs aluminum foil positioning baffles around the lower mold, which can position the aluminum foil and prevent it from moving; the upper mold edge has a containing groove for placing the aluminum foil positioning baffle, which facilitates the cooperation and positioning of the upper and lower molds. The edge of the lower mold is a cutting edge, which completes the trimming of the product after pre-pressing forming, without the need for additional processing procedures, greatly improving production efficiency.

[0025] 7) The present application embeds an ejection block in the upper mold. After the aluminum foil is formed, it is tightly attached to the mold cavity, and workers have the risk of being cut by hand. The ejection block is used to eject the formed aluminum foil product, and the worker can take out the product from the mold. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a top view of the upper mold of the present application.

[0027] Figure 2 It is a front view of the upper mold of the present application.

[0028] Figure 3 It is a top view of the lower mold of the present application.

[0029] Figure 4 It is a front view of the lower mold of the present application.

[0030] Figure 5 It is a structural schematic diagram of the pre-pressing block of the present application.

[0031] Figure 6The top view of the knife bolster of the present application.

[0032] Figure 7 The side view of the knife bolster of the present application.

[0033] Figure 8 The schematic view of the pre-bayonet structure of the present application.

[0034] The reference signs in the figure: 1, upper die, 10, pre-pressing block, 11, pre-bayonet, 12, ejection block, 13, accommodating groove, 2, lower die, 20, knife bolster, 21, aluminum foil positioning baffle, 22, cutting edge, 3, part boundary line. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the protection scope of the present application.

[0036] The present application provides an aluminum foil pre-pressing and trimming die for automobile parts, which comprises an upper die 1 and a lower die 2. The upper die 1 and the lower die 2 cooperate with each other, the aluminum foil is placed on the lower die 2, and the aluminum foil is formed after the upper die 1 and the lower die 2 are closed.

[0037] As shown in Figure 1 and Figure 2 , the pre-pressing block 10, the pre-bayonet 11 and the ejection block 12 are embedded on the upper die 1. As shown in Figure 5 , the pre-pressing block 10 is connected with the upper die 1 through a spring, the extension direction of the spring is perpendicular to the aluminum foil, and the pre-pressing block 10 moves in the direction perpendicular to the aluminum foil under the driving of the spring. The pre-pressing block 10 can be multiple blocks, which are arranged at positions close to different boundary lines respectively, so that the pressure is more uniform, and tearing of the aluminum foil caused by uneven stress can be prevented. The multiple pre-pressing blocks 10 can also be arranged on the upper die 1 in other ways, which are determined according to the actual cavity shape of the die, and the uniform force is ensured. The upper die 1 is provided with a part boundary line 3, and the pre-bayonet 11 is installed on the part boundary line 3 in the middle of the upper die 1, as shown in Figure 8As shown, the pre-bayonet 11 is triangular, one of the corners extends to the outside of the upper die 1, the height of the pre-bayonet 11 is higher than the height of the highest point on the upper die 1, and the height of the pre-pressing block 10 is higher than the height of the pre-bayonet 11 when the spring is in a free state. After the aluminum foil is formed, it is tightly attached to the mold cavity, and workers take out the aluminum foil product with the risk of cutting hands. The formed aluminum foil product is pushed out by the ejection block 12, and the worker can take out the product from the mold; in order to ensure uniform force, a plurality of ejection blocks 12 are uniformly arranged on the upper die 1 and close to the pre-pressing block 10. The pre-pressing block 10 and the ejection block 12 both have a cavity shape required by the mold.

[0038] The edge of the upper die 1 has a receiving groove 13, when the upper die 1 and the lower die 2 cooperate with each other, the aluminum foil positioning baffle 21 is located in the receiving groove 13, which facilitates the cooperation and positioning of the upper die 1 and the lower die 2.

[0039] As shown in Figure 3 and Figure 4 The lower die 2 includes a plurality of blocks, the gap between the plurality of blocks is a parting line 3, and the gap (parting line 3) in the middle of the lower die 2 is provided with a knife rest 20, as shown in Figure 6 and Figure 7 When the upper die 1 and the lower die 2 are closed, the pre-bayonet 11 penetrates the aluminum foil and extends into the knife rest 20. The edge of the lower die 2 close to the upper die 1 is a cutting edge 22, which cuts the edge of the aluminum foil while the aluminum foil is being formed, and completes the trimming. The aluminum foil positioning baffle 21 is installed around the lower die 2, which is perpendicular to the aluminum foil and has a height higher than the height of the highest point on the lower die 2, so as to block the aluminum foil on the lower die 2 and prevent it from shifting.

[0040] The working process of the present application is as follows: a large piece of flat aluminum foil is placed on the lower die 2, the pre-pressing block 10 fixes the aluminum foil on the profile of the lower die 2, and then the upper die 1 is closed to press and form, and at the same time the cutting edge 22 on the edge of the lower die 2 trims the edge of the aluminum foil to completion; when these actions are completed, the aluminum foil will be torn due to stretching when the part shape difference is large, so the pre-bayonet 11 is installed at the parting of the mold in the middle, so that the part changes with the depth of the mold closing during pre-pressing, and the aluminum foil is continuously pierced to avoid tearing. The cavity of the mold in the drawing is only schematically drawn, and the actual processing requirement is used as the standard.

[0041] Through testing, the automobile part aluminum foil pre-pressing and trimming die provided by the present application can greatly avoid tearing the aluminum foil when the part difference is large, which helps to improve the part qualification rate, and the single shift finished product rate can reach 95%.

[0042] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements shall be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A pre-pressing and trimming die for aluminum foil used in automotive parts, characterized in that, The application relates to a die set for producing a part, comprising an upper die (1) and a lower die (2), wherein the upper die (1) and the lower die (2) are provided with a part boundary line (3), the upper die (1) and the lower die (2) are matched with each other, and an aluminum foil is placed on the lower die (2); a pre-pressing block (10) and a pre-bayonet (11) are embedded on the upper die (1), the pre-pressing block (10) is slidingly installed on the upper die (1), and the sliding direction is perpendicular to the aluminum foil; the pre-bayonet (11) is located on the part boundary line (3) and extends to the outside of the upper die (1), and the height of the pre-bayonet (11) is higher than the height of the highest point on the upper die (1).

2. The pre-pressing and trimming die for an aluminum foil for an automobile part according to claim 1, characterized in that, The lower die (2) is provided with a knife bolster (20), the pre-bayonet (11) penetrates through the aluminum foil and extends into the knife bolster (20).

3. The pre-pressing and trimming die for an aluminum foil for an automobile part according to claim 2, characterized in that, The lower die (2) comprises a plurality of blocks, the gap between the blocks is the part boundary line (3), the pre-bayonet (11) is located on the part boundary line (3) in the middle of the upper die (1), and the knife bolster (20) is installed in the gap in the middle of the lower die (2).

4. The pre-pressing and trimming die for an aluminum foil for an automobile part according to claim 1, characterized in that, The pre-bayonet (11) is triangular, one of the angles of the pre-bayonet (11) extends to the outside of the upper die (1) and has a height higher than the height of the highest point on the upper die (1).

5. The pre-pressing and trimming die for an aluminum foil for an automobile part according to claim 1, characterized in that, A spring is installed between the pre-pressing block (10) and the upper die (1), the extension direction of the spring is perpendicular to the aluminum foil, and when the spring is in a free state, the height of the pre-pressing block (10) is higher than the height of the pre-bayonet (11).

6. The pre-pressing and trimming die for an aluminum foil for an automobile part according to claim 1, characterized in that, The pre-pressing block (10) is a plurality of blocks and is arranged at positions close to different boundary lines.

7. The pre-pressing and trimming die for an aluminum foil for an automobile part according to claim 1, characterized in that, An aluminum foil positioning baffle (21) is installed around the lower die (2), and the height of the aluminum foil positioning baffle (21) is higher than the height of the highest point on the lower die (2).

8. The pre-pressing and trimming die for an aluminum foil for an automobile part according to claim 7, characterized in that, The edge of the upper die (1) is provided with a containing groove (13), and when the upper die (1) and the lower die (2) are matched with each other, the aluminum foil positioning baffle (21) is located in the containing groove (13).

9. The pre-pressing and trimming die for an aluminum foil for an automobile part according to claim 1, characterized in that, The edge of the lower die (2) close to the upper die (1) is a cutting edge (22).

10. The pre-press trimming die for an aluminum foil for an automobile part according to claim 1, characterized in that, The upper die (1) is further embedded with an ejection block (12).

Images