Automotive hood riveting processing mold

Abstract

This utility model discloses a riveting mold for an automobile hood panel. The automobile hood panel riveting mold includes a lower mold and an upper mold. The lower mold includes a base, and a shaping component is provided above the base to shape the bottom end of the riveting area of ​​the automobile hood panel. The shaping component includes a fixing block, and a shaping mold that can slide left and right and open is provided above the fixing block, as well as a driving structure for driving the shaping mold to slide and reset. This utility model uses a driving structure to allow the left and right halves of the shaping mold to slide left and right and open after riveting, so that the riveting point of the automobile hood panel does not need to be forcibly pushed out of the closed mold cavity. Before opening the mold, the shaping component is driven to rotate as a whole by a rotation structure. The rotation helps the riveting point to disengage from the recess of the lower mold, gently breaking the adhesion and reducing the possibility of damage to the riveting point and surrounding sheet metal when the workpiece is removed.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, specifically to a riveting mold for automotive front hood panels. Background Technology

[0002] To increase the overall rigidity and dent resistance of a car hood, the inner hood panel is usually welded with reinforcing beams, ribs, or brackets of various shapes. These reinforcing components are connected to the main body of the inner hood, and riveting is often used when the connection point needs to withstand large shear forces or when the structural design is not suitable for welding.

[0003] Rivetless riveting involves using the mechanical pressure of upper and lower molds to cause localized plastic deformation of single or multiple layers of hood material, forming an interlocking convex-concave connection structure. The aluminum alloy or high-strength steel commonly used in hoods has high plasticity and is prone to microscopic adhesion to the mold surface under high pressure. In addition, if the draft angle of the lower mold recess is insufficient or the radius of the rounded corner of the upper mold protrusion is too small, it will hinder the material from leaving the mold and affect the appearance of the car hood. Utility Model Content

[0004] The purpose of this utility model is to provide a riveting processing mold for automotive hood panels. By setting the shaping mold of the riveting point to be able to open left and right, the pressed automotive hood panel can be opened through the mold to achieve demolding. The shaping mold is set to be rotatable. After the riveting point is completed, the shaping mold is rotated left and right to assist the pressed sheet metal to be separated from the mold cavity, and then the shaping mold is driven to open to both sides, reducing the risk of appearance scratches caused by the sheet metal parts being directly ejected upward from the mold.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a car hood riveting processing mold, including a lower mold and an upper mold, wherein the lower mold includes a base, a shaping component for shaping the bottom end of the car hood riveting area is provided above the base, and a rotating structure capable of driving the shaping component to rotate is provided below the base.

[0006] The shaping component includes a fixing block, and a shaping mold that can slide open left and right is provided above the fixing block, as well as a driving structure for driving the shaping mold to slide and reset. A limit block is fixed to the upper surface of the fixing block by screws, and the limit block is located outside the shaping mold.

[0007] Preferably, the shaping mold includes a left half mold and a right half mold, which are combined to form a riveting cavity.

[0008] Preferably, the driving structure includes two sets of driving rods. The two sets of driving rods are inserted into one side of the limiting block and slidably connected to the limiting block. One side of the driving rod contacts the inner wall of the limiting block, and the other side of the driving rod contacts the side wall of the fixing block.

[0009] Preferably, a connecting rod for connecting to an external telescopic drive is fixed between the two sets of drive rods, and a sliding guide structure is provided above the fixed block.

[0010] Preferably, the sliding guide structure includes a guide block and a guide groove. The guide block is fixedly connected to the fixing block by screws. The guide groove is opened at the bottom of the forming mold, and the guide block is slidably connected in the guide groove.

[0011] Preferably, the driving structure further includes a nitrogen spring, the telescopic end of which passes through the limiting block and is fixedly connected to the outer wall of the fixing block.

[0012] Preferably, the rotating structure includes a rotating motor, a cavity for mounting the rotating motor is provided below the base, a fixing seat is fixed to the upper surface of the base by screws, a rotating block is rotatably connected to the fixing seat by bearings, the fixing block is fixed above the rotating block by screws, and the output end of the rotating motor is fixedly connected to the rotating block.

[0013] Preferably, the upper mold includes a top seat and a lower pressing mold fixed below the top seat, the lower pressing mold being located directly above the shaping mold.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention uses a driving structure to allow the left and right halves of the shaping mold to slide open after riveting, eliminating the need for the riveting points of the car hood to be forcibly ejected from the closed mold cavity. Before opening the mold, a rotating structure drives the shaping assembly to rotate as a whole, using the rotational motion to help the riveting points disengage from the lower mold recess, gently breaking the adhesion and reducing the possibility of damage to the riveting points and surrounding sheet metal when the workpiece is removed.

[0016] Traditional integral lower mold recesses have strict requirements on the draft angle and fillet radius, otherwise they are prone to jamming. This utility model designs the lower mold shaping part as a separable left and right half mold, which can be opened directly during demolding, avoiding the demolding resistance problem caused by insufficient draft angle or too small fillet radius. Even for rivets with complex shapes or deep engagement, smooth demolding can be achieved, reducing the risk of jamming and reducing workpiece scratches. It is especially suitable for riveting of automotive front hood panels with high appearance requirements. Attached Figure Description

[0017] Figure 1 This is an isometric drawing of this utility model;

[0018] Figure 2 This is an exploded view of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the shaping component of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the shaping mold of this utility model.

[0021] In the diagram: 1. Lower mold; 2. Upper mold;

[0022] 101. Base; 102. Shaping component; 103. Rotating structure;

[0023] 1021. Fixing block; 1022. Shaping mold; 1023. Driving structure; 1024. Limiting block;

[0024] 1022a, Left half mold; 1022b, Right half mold; 1022c, Riveting cavity;

[0025] 1023a, drive rod; 1023b, connecting rod; 1023c, guide block; 1023d, guide groove; 1023e, nitrogen spring;

[0026] 1031. Rotating motor; 1032. Cavity; 1033. Fixed base; 1034. Rotating block;

[0027] 201. Top seat; 202. Lower die. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-4 This utility model provides a technical solution: a riveting processing mold for an automobile hood panel, including a lower mold 1 and an upper mold 2. The lower mold 1 includes a base 101. A shaping component 102 for shaping the bottom end of the riveting area of ​​the automobile hood panel is provided above the base 101. A rotating structure 103 capable of driving the shaping component 102 to rotate is provided below the base 101. By setting the rotating structure 103, after the sheet metal part is riveted and formed by the shaping component 102, the shaping component 102 rotates left and right. The rotation helps the riveting point to disengage from the recess of the lower mold, gently breaking the adhesion.

[0030] The shaping component 102 includes a fixing block 1021. A shaping mold 1022 that can be slid open left and right is provided above the fixing block 1021, as well as a driving structure 1023 for driving the shaping mold 1022 to slide and reset. A limit block 1024 is fixed to the upper surface of the fixing block 1021 by screws. The limit block 1024 is located outside the shaping mold 1022.

[0031] By setting the shaping mold 1022 to be able to slide open left and right, the demolding resistance problem caused by insufficient draft angle or excessively small corner radius is avoided. The structure of the shaping mold 1022 is as follows: Figure 3 As shown.

[0032] The shaping mold 1022 includes a left half mold 1022a and a right half mold 1022b, which are combined to form a riveting cavity 1022c.

[0033] The driving structure 1023 includes a driving rod 1023a, of which two sets are provided. Both sets of driving rods 1023a are inserted into one side of the limiting block 1024 and slidably connected to the limiting block 1024. One side of the driving rod 1023a contacts the inner wall of the limiting block 1024, and the other side of the driving rod 1023a contacts the side wall of the fixing block 1021. Figure 3 As shown, when the drive rod 1023a extends into the limiting block 1024, it is inserted between the fixing block 1021 and the limiting block 1024. Since the two fixing blocks 1021 support the left half mold 1022a and the right half mold 1022b respectively, the two fixing blocks 1021 overcome the elastic force of the nitrogen spring 1023e and move closer to each other, realizing the closing of the left half mold 1022a and the right half mold 1022b. The riveting point is formed in the riveting cavity 1022c.

[0034] A connecting rod 1023b for external telescopic drive is fixed between the two sets of drive rods 1023a. A sliding guide structure is provided above the fixed block 1021. By connecting the two drive rods 1023a and the connecting rod 1023b, when the equipment is in use, the connecting rod 1023b is fixed to the external telescopic device, such as the telescopic end of the hydraulic cylinder. At this time, the hydraulic cylinder can drive the connecting rod 1023b to push the drive rod 1023a between the fixed block 1021 and the limiting block 1024, or pull it out from between the fixed block 1021 and the limiting block 1024. When pulled out, the left half mold 1022a and the right half mold 1022b move away from each other under the rebound of the nitrogen spring 1023e, so that the shaping mold 1022 opens to both sides, allowing the riveting point to be demolded. Compared with the traditional direct top ejection demolding, this method has lower requirements for the accuracy of the angle and diameter dimensions within the mold cavity.

[0035] The sliding guide structure includes a guide block 1023c and a guide groove 1023d. The guide block 1023c is fixedly connected to the fixing block 1021 by screws. The guide groove 1023d is formed at the bottom of the shaping mold 1022, and the guide block 1023c is slidably connected within the guide groove 1023d. When the left half mold 1022a and the right half mold 1022b move away from or closer to each other, the guide block 1023c slides within the guide groove 1023d, restricting the horizontal movement of the left half mold 1022a and the right half mold 1022b.

[0036] The drive structure 1023 also includes a nitrogen spring 1023e, the telescopic end of which passes through the limiting block 1024 and is fixedly connected to the outer wall of the fixed block 1021. The nitrogen spring 1023e is a commercially available product, mainly composed of a cylinder, piston rod, piston, high-pressure sealing system, and inflation valve. In this embodiment, the piston rod of the nitrogen spring 1023e is fixedly connected to the fixed block 1021. When the drive rod 1023a is pulled away from between the fixed block 1021 and the limiting block 1024, the fixed block 1021 is reset via the nitrogen spring 1023e.

[0037] The rotating structure 103 includes a rotating motor 1031. A cavity 1032 for mounting the rotating motor 1031 is provided below the base 101. A fixing seat 1033 is fixed to the upper surface of the base 101 by screws. A rotating block 1034 is rotatably connected to the fixing seat 1033 via bearings. The fixing block 1021 is fixed above the rotating block 1034 by screws. The output end of the rotating motor 1031 is fixedly connected to the rotating block 1034. After the rotating motor 1031 is started, the rotating block 1034 rotates, driving the fixing block 1021 above the rotating block 1034 to rotate, thereby realizing the rotation of the entire shaping assembly 102.

[0038] The upper mold 2 includes a top seat 201 and a lower pressing mold 202 fixed below the top seat 201. The lower pressing mold 202 is located directly above the shaping mold 1022.

[0039] In use, by connecting the two drive rods 1023a to the connecting rod 1023b, when the equipment is in use, the connecting rod 1023b is fixed to the external telescopic device, such as the telescopic end of the hydraulic cylinder. At this time, the hydraulic cylinder can drive the connecting rod 1023b to push the drive rod 1023a into the space between the fixing block 1021 and the limiting block 1024, so that the two sets of fixing blocks 1021 are forced to slide. The two sets of fixing blocks 1021 respectively drive the left half mold 1022a and the right half mold 1022b to move closer to each other, forming the riveting cavity 1022c.

[0040] The upper mold 2 is pressed into the shaping mold 1022 of the lower mold 1 by an external drive. That is, the lower pressing mold 202 is pressed into the riveting cavity 1022c formed by the left half mold 1022a and the right half mold 1022b, so that the car hood sheet metal and the riveted parts are pressed into the riveting cavity 1022c together. The structure of the riveting cavity 1022c is as follows: Figure 4 As shown, it has a convex-concave structure that is larger at the bottom and smaller at the top. During riveting, high pressure is applied to a predetermined position on the front cover of the car by external drive, causing the sheet to undergo plastic deformation and form interlocking riveting points, thereby realizing the riveting and fixing of the front cover of the car to the riveting parts.

[0041] The rotating structure 103 drives the entire shaping component 102 to rotate in both directions at small angles, such as ±15°. The rotational action applies a shearing force and a torque to the sheet metal that is still microscopically adhered to the mold cavity 1032 after plastic deformation, gently breaking the adhesion and causing the rivet points to loosen initially and break away from the tight engagement with the mold cavity wall.

[0042] Specifically, after the rotation motor 1031 is started, the rotating block 1034 rotates, which drives the fixed block 1021 above the rotating block 1034 to rotate, thereby realizing the rotation of the entire shaping assembly 102;

[0043] After rotation, the drive rod 1023a is pulled away from the fixed block 1021 and the limiting block 1024 by external drive. When pulled away, the left half mold 1022a and the right half mold 1022b move away from each other under the rebound of the nitrogen spring 1023e, so that the shaping mold 1022 opens to both sides and the rivet point is demolded.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold for riveting automotive hood panels, characterized in that: It includes a lower mold (1) and an upper mold (2). The lower mold (1) includes a base (101). A shaping component (102) for shaping the bottom end of the riveting part of the car front cover is provided above the base (101). A rotating structure (103) capable of driving the shaping component (102) to rotate is provided below the base (101). The shaping component (102) includes a fixing block (1021), and a shaping mold (1022) that can be slid open left and right is provided above the fixing block (1021), as well as a driving structure (1023) for driving the shaping mold (1022) to slide and reset. A limit block (1024) is fixed to the upper surface of the fixing block (1021) by screws, and the limit block (1024) is located outside the shaping mold (1022).

2. The automotive hood riveting die according to claim 1, characterized in that: The shaping mold (1022) includes a left half mold (1022a) and a right half mold (1022b), and the left half mold (1022a) and the right half mold (1022b) are combined to form a riveting cavity (1022c).

3. The automotive hood riveting die according to claim 2, characterized in that: The driving structure (1023) includes a driving rod (1023a), which is provided in two sets. The two sets of driving rods (1023a) are inserted into one side of the limiting block (1024) and are slidably connected to the limiting block (1024). One side of the driving rod (1023a) contacts the inner wall of the limiting block (1024), and the other side of the driving rod (1023a) contacts the side wall of the fixing block (1021).

4. The automotive hood riveting die according to claim 3, characterized in that: A connecting rod (1023b) for connecting to an external telescopic drive is fixed between the two sets of drive rods (1023a), and a sliding guide structure is provided above the fixed block (1021).

5. The automotive hood riveting die according to claim 4, characterized in that: The sliding guide structure includes a guide block (1023c) and a guide groove (1023d). The guide block (1023c) is fixedly connected to the fixing block (1021) by screws. The guide groove (1023d) is opened at the bottom of the shaping mold (1022). The guide block (1023c) is slidably connected in the guide groove (1023d).

6. The automotive hood riveting die according to claim 5, characterized in that: The drive structure (1023) also includes a nitrogen spring (1023e), the telescopic end of which passes through the limiting block (1024) and is fixedly connected to the outer wall of the fixing block (1021).

7. The automotive hood riveting die according to claim 6, characterized in that: The rotating structure (103) includes a rotating motor (1031). A cavity (1032) for mounting the rotating motor (1031) is provided below the base (101). A fixing seat (1033) is fixed to the upper surface of the base (101) by screws. A rotating block (1034) is rotatably connected to the fixing seat (1033) by bearings. The fixing block (1021) is fixed above the rotating block (1034) by screws. The output end of the rotating motor (1031) is fixedly connected to the rotating block (1034).

8. The automotive hood riveting die according to claim 1, characterized in that: The upper mold (2) includes a top seat (201) and a lower pressing mold (202) fixed below the top seat (201), the lower pressing mold (202) being located directly above the shaping mold (1022).

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