High-efficiency processing method and device for 180-degree overlap of automobile engine compartment cover

Abstract

The present invention discloses a method and a processing device for efficiently processing 180-degree overlap of an automobile engine compartment cover, and the method includes a pre-flanging process using a pre-flanging device: bending the edge of the compartment cover workpiece where overlap is required, and then pre-flanging the edge of the bent part of the compartment cover workpiece at a predetermined angle; and a overlap process using the overlap device: overlapping the part of the compartment cover workpiece after pre-flanging. The present invention does not require expensive special equipment and tooling to achieve efficient processing of 180-degree overlap of an automobile engine compartment cover, and the mold structure is simple and easy to maintain, and the overlap size can be guaranteed, which solves the problems of large investment in existing 180-degree overlap tooling for automobile engine compartment covers, the need for a special processing site, and high maintenance costs for equipment and tooling.

Description

Technical Field

[0001] The invention relates to a structural realization technology for overlapping edges of undulating product surfaces and irregular contours, and in particular to a high-efficiency processing method and a processing device for a 180-degree overlapping edge of an automobile engine compartment cover. Background Art

[0002] With the rapid development of the automobile industry, more and more automobile models are launched on the market every year at home and abroad, and consumers' requirements for the cost performance of automobiles have increased accordingly. Therefore, the automobile industry has higher and higher requirements for product cost control, and each link must produce and manufacture products with the goal of low cost and high quality. At present, the hemming processing of automobile engine hoods, especially the 180-degree hemming processing, is mostly achieved by robots or manual special machines. The investment in tooling is large, the hemming processing process is complicated, and special places are required for processing. The maintenance costs of equipment and tooling are high. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method and a device for efficiently processing 180-degree overlapped edges of automobile engine compartment covers, which solves the problems of large investment in tooling for overlapped edge processing and high maintenance costs for equipment and tooling.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: an efficient processing method for 180-degree folding of an automobile engine compartment cover, which is to perform folding processing on the compartment cover workpiece after the drawing process OP10, the trimming process OP20 and the punching process OP30, including the following steps:

[0005] Pre-flanging process OP40: positioning the bin cover workpiece based on the punching holes in the punching process OP30, then bending the edge of the bin cover workpiece where the edge needs to be folded, and then pre-flanging the edge of the bent part of the bin cover workpiece at a predetermined angle;

[0006] Folding process OP50: The bin cover workpiece is positioned based on the punching holes in the punching process OP30, and then the pre-flanging portion of the bin cover workpiece is folded.

[0007] As a preferred technical solution, in the pre-flanging process OP40, the edge of the bent portion of the bin cover workpiece is pre-flanged at 60°.

[0008] The 180-degree hemming high-efficiency processing device for automobile engine compartment cover performs hemming processing on the compartment cover workpiece after being processed by the drawing device, the trimming device and the punching device, including a pre-flanging device for pre-flanging the edge of the compartment cover workpiece, and a hemming device for hemming the pre-flanged part of the compartment cover workpiece after being processed by the pre-flanging device.

[0009] As a preferred technical solution, the pre-flanging device includes a pre-flanging upper die and a pre-flanging lower die that cooperate with each other, a pre-flanging upper cavity and a pre-flanging lower cavity are respectively arranged between the pre-flanging upper die and the pre-flanging lower die, a pre-flanging positioning base column that cooperates with the punching hole on the bin cover workpiece is arranged in the pre-flanging lower cavity, and a pre-flanging boss corresponding to the edge of the bin cover workpiece is also arranged in the pre-flanging lower cavity, a pre-flanging punch is protruding from the upper surface of the pre-flanging boss, an inner mold surface is arranged on the inner side of the pre-flanging punch, and the outer side of the pre-flanging punch is an inclined outer mold surface, and the outer mold surface is inclined outward and downward ; A bending arc surface connecting the inner die surface and the outer die surface is arranged at the top of the pre-flanging punch; a pre-flanging pressing body is slidingly arranged in the pre-flanging upper cavity to press and fix the edge of the bin cover workpiece on the pre-flanging boss, a bending groove is arranged on the outer side of the bottom end of the pre-flanging pressing body, a bending surface matching the inner die surface is arranged in the bending groove, and a bending surface corresponding to the bending arc surface is arranged on the top of the bending groove; a pre-flanging insert is arranged on the outer side of the pre-flanging pressing body in the pre-flanging upper cavity, and a bending inclined surface corresponding to the outer die surface is arranged on the inner side of the bottom end of the pre-flanging insert.

[0010] As a preferred technical solution, the inner mold surface includes an upper mold plane vertically arranged on the inner upper part of the pre-flanging punch, and an arc guide surface is arranged between the bottom of the upper mold plane and the upper surface of the pre-flanging punch; the inner and outer ends of the bending arc surface are respectively connected to the upper mold plane and the top of the outer mold surface.

[0011] As a preferred technical solution, the outer mold surface is inclined outward and downward at an angle of 60°.

[0012] As a preferred technical solution, the folding device includes an folding upper die and a folding lower die which cooperate with each other, an folding upper cavity and a folding lower cavity are respectively arranged between the folding upper die and the folding lower die, and a folding positioning base column cooperating with the punching hole on the bin cover workpiece is arranged in the folding lower cavity; a folding support platform corresponding to the edge of the bin cover workpiece is also arranged in the folding lower cavity, and a folding press body which presses and fixes the edge of the bin cover workpiece on the folding support platform is slidably arranged in the folding upper cavity, and a folding groove which can accommodate the edge of the bin cover workpiece after bending is arranged on the outer side of the bottom end of the folding press body, and a folding insert is arranged on the outer side of the folding press body in the folding upper cavity, the inner side of the folding insert is fitted with the outer side of the folding press body, and the inner side of the bottom end of the folding insert is arranged on the inner side of the bottom end of the folding insert.

[0013] As a preferred technical solution, the outer surface of the folding press body and the outer surface of the folding support platform are arranged flush.

[0014] As a preferred technical solution, a folding protrusion cooperating with the folding groove is arranged on the outer side of the top end of the folding support platform.

[0015] Due to the adoption of the above-mentioned technical solution of the efficient processing method and processing device of 180-degree overlapping of automobile engine compartment cover, the present invention does not require expensive special equipment and tooling such as rolling machines to achieve efficient processing of 180-degree overlapping of automobile engine compartment cover, thereby improving production efficiency, and the mold structure is simple and easy to maintain, while ensuring the consistency of the overlapping size and the product, thereby solving the problems of large investment in existing 180-degree overlapping tooling of automobile engine compartment cover, the need for special processing sites, and high maintenance costs of equipment and tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0017] Figure 1 It is a process flow chart of the present invention;

[0018] Figure 2 is a schematic diagram of the processing equipment of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the pre-flanging device of the present invention;

[0020] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 is a top view of the hemming device of the present invention;

[0022] Figure 6 yes Figure 5 Schematic diagram of CC section;

[0023] Figure 7 yes Figure 6 Enlarged view of point B in the middle.

[0024] In the figure: 1-pre-turning upper die; 11-pre-turning upper cavity; 12-pre-turning pressing body; 121-bending surface; 122-bending surface; 13-pre-flanging insert; 131-bending inclined surface; 2-pre-turning lower die; 21-pre-turning lower cavity; 22-pre-flanging boss; 23-pre-flanging punch; 231-outer die surface; 232-upper die plane; 233-arc guide surface; 234-bending arc surface; 3-stacked upper die; 31-stacked upper cavity; 32-stacked pressing body; 321-stacked groove; 33-stacked insert; 331-arc cutting edge; 4-stacked lower die; 41-stacked lower cavity; 42-stacked support platform; 421-stacked protrusion; 5-bin cover workpiece. DETAILED DESCRIPTION

[0025] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that, in the accompanying drawings, the same reference numerals are given to components having substantially the same structure and function, and redundant descriptions of substantially the same components are omitted to make the specification more concise.

[0026] like Figure 1 As shown, the efficient processing method for 180-degree hemming of the automobile engine compartment cover is to perform hemming processing on the compartment cover workpiece 5 after the drawing process OP10, the trimming process OP20 and the punching process OP30, including the following processes:

[0027] Pre-flanging process OP40: the bin cover workpiece 5 is positioned based on the punching in the punching process OP30, and then the edges of the bin cover workpiece 5 where they need to be folded are bent, and then the edges of the bent parts of the bin cover workpiece 5 are pre-flanged at a predetermined angle; preferably, in the pre-flanging process OP40, the edges of the bent parts of the bin cover workpiece 5 are pre-flanged at 60°, and can also be pre-flanged at 45°, 50°, or other angles that are convenient for production according to actual production needs.

[0028] The stacking process OP50: the bin cover workpiece 5 is positioned based on the punching holes in the punching process OP30, and then the bin cover workpiece 5 is stacked after the pre-flanging.

[0029] The processing method firstly adopts the currently conventional engine compartment cover processing mold to perform the drawing process OP10, the trimming process OP20 and the punching process OP30 on the compartment cover workpiece 5, and then performs the pre-flanging process OP40 and the overlapping process OP50 to achieve the 180-degree overlapping of the automobile engine compartment cover, and finally meets the overlapping requirements of the product. The processing equipment has a simple structure, is easy to operate, has high efficiency and is easy to maintain.

[0030] like Figure 2 As shown, the efficient processing device for 180-degree hemming of the automobile engine compartment cover performs hemming processing on the compartment cover workpiece 5 processed by the drawing device, the trimming device and the punching device, including a pre-flanging device for pre-flanging the edge of the compartment cover workpiece 5, and a hemming device for hemming the pre-flanged part of the compartment cover workpiece 5 processed by the pre-flanging device. When the automobile engine compartment cover is subjected to 180-degree hemming processing, the compartment cover workpiece 5 is first subjected to drawing, trimming and punching processing by the currently conventional drawing device, trimming device and punching device, and then the pre-flanging device and hemming device are used to perform hemming processing on the processed compartment cover workpiece 5. The 180-degree hemming processing of the automobile engine compartment cover does not require expensive special equipment and tooling such as a hemming machine, and the processing equipment has a simple structure, is easy to operate, has high efficiency and is easy to maintain.

[0031] like Figure 3 and Figure 4 As shown, a highly efficient processing device for 180-degree folding of an automobile engine compartment cover comprises a pre-flanging device for pre-flanging the edge of a compartment cover workpiece 5 where folding is required, and a folding device for folding the portion of the compartment cover workpiece 5 after pre-flanging, the pre-flanging device comprises a pre-flanging upper die 1 and a pre-flanging lower die 2 which cooperate with each other, a pre-flanging upper cavity 11 and a pre-flanging lower cavity 21 are respectively arranged between the pre-flanging upper die 1 and the pre-flanging lower die 2, a pre-flanging positioning base column which cooperates with the punching hole on the compartment cover workpiece 5 is arranged in the pre-flanging lower cavity 21, a pre-flanging boss 22 which corresponds to the edge of the compartment cover workpiece 5 is also arranged in the pre-flanging lower cavity 21, a pre-flanging boss 23 which protrudes from the upper surface of the pre-flanging boss 22, an inner mold surface is arranged on the inner side of the pre-flanging boss 23, and an inclined outer side of the pre-flanging boss 23 is provided. An obliquely arranged outer die surface 231, and the outer die surface 231 is inclined outward and downward; a bending arc surface 234 connecting the inner die surface and the outer die surface 231 is arranged on the top of the pre-flanging punch 23; a pre-flanging pressing body 12 is slidably arranged in the pre-flanging upper cavity 11 to press and fix the edge of the bin cover workpiece 5 on the pre-flanging boss 22, a bending groove is arranged on the outer side of the bottom end of the pre-flanging pressing body 12, a bending surface 121 cooperating with the inner die surface is arranged in the bending groove, and a bending surface 122 corresponding to the bending arc surface is arranged on the top of the bending groove; a pre-flanging insert 13 is arranged on the outer side of the pre-flanging pressing body 12 in the pre-flanging upper cavity 11, and a bending oblique surface 131 corresponding to the outer die surface 231 is arranged on the inner side of the bottom end of the pre-flanging insert 13. The inner mold surface includes an upper mold plane 232 vertically arranged on the inner upper part of the pre-flanging punch 23, and an arc guide surface 233 is arranged between the bottom of the upper mold plane 232 and the upper surface of the pre-flanging punch 23; the inner and outer ends of the bending arc surface 234 are respectively connected to the upper mold plane 232 and the top of the outer mold surface 231.

[0032] During the pre-flanging process, the bin cover workpiece 5 after drawing, trimming and punching is placed in the pre-flanging lower die 2 in the open state of the pre-flanging upper die 1 and the pre-flanging lower die 2, and the straight edge of the bin cover workpiece 5 to be overlapped is placed on the pre-flanging boss 22, and then the pre-flanging upper die 1 and the pre-flanging lower die 2 begin to close the mold, and the pre-flanging pressing body 12 moves downward to first contact the edge of the bin cover workpiece 5 and press it to fix it on the pre-flanging boss 22, and cooperates with the pre-flanging punch 23 to form a pre-flanging punch 23 on the pre-flanging punch 23. The upper die plane 232, the arc guide surface 233 and the bending arc surface 234 of the inner die surface cooperate with the bending surface 121 and the bending surface 122 in the bending groove of the pre-flanging pressing body 12 to initially bend and deform the straight edge of the bin cover workpiece 5 where the overlap is required, and then the pre-flanging insert 13 moves downward, and the pre-flanging insert 13 contacts the outer end of the edge of the bin cover workpiece 5 after bending and deformation, and is pressed down and bent under the cooperation of the bending slope 131 on the inner side of the bottom end of the pre-flanging insert 13 and the outer die surface 231 inclined on the outer side of the pre-flanging punch 23, so as to realize the pre-flanging shaping of the edge of the bin cover workpiece 5. A spring can be arranged between the pre-flanging pressing body 12 and the pre-flanging upper die 1, and the pre-flanging pressing body 12 is pushed toward the pre-flanging lower die 2 by the spring, so as to realize the purpose that the pre-flanging pressing body 12 cooperates with the pre-flanging boss 22 to press and fix the bin cover workpiece 5 before the pre-flanging insert 13 moves downward. In addition, the outer mold surface 231 can be tilted outward and downward at an angle of 60° to the vertical direction, so that the edge of the bin cover workpiece 5 after the pre-flanging process is pre-flanged at 60°, and the outer mold surface 231 can be tilted outward and downward at an angle of 45°, 50°, etc. to the vertical direction for easy production.

[0033] like Figure 5 , Figure 6 and Figure 7 As shown, the stacking device includes a stacking upper die 3 and a stacking lower die 4 that cooperate with each other, and an upper stacking cavity 31 and a lower stacking cavity 41 are respectively arranged between the stacking upper die 3 and the stacking lower die 4, and a stacking positioning base column cooperating with the punching hole on the bin cover workpiece 5 is arranged in the stacking lower cavity 41; a stacking support platform 42 corresponding to the edge of the bin cover workpiece 5 is also arranged in the stacking lower cavity 41, and a stacking press body 32 that presses and fixes the edge of the bin cover workpiece 5 on the stacking support platform 42 is slidably arranged in the stacking upper cavity 31, and a stacking groove 321 that can accommodate the edge of the bin cover workpiece 5 after bending is arranged on the outer side of the bottom end of the stacking press body 32, and a stacking insert 33 is arranged on the outer side of the stacking press body 32 in the stacking upper cavity 31, and the inner side of the stacking insert 33 is fitted with the outer side of the stacking press body 32, and the inner side of the bottom end of the stacking insert 33 is provided with an arc-shaped cutting edge 331. The outer surface of the folding press body 32 is flush with the outer surface of the folding support platform 42. The outer side of the top of the folding support platform 42 is provided with a folding protrusion 421 that cooperates with the folding groove 321.

[0034] During the hemming process, the pre-flanged bin cover workpiece 5 is placed in the hemming lower die 4, and is positioned by the punching holes on the bin cover workpiece 5 and the hemming positioning base columns on the hemming lower die 4. The pre-flanged rear edge of the bin cover workpiece 5 is placed on the hemming support platform 42, and then the hemming upper die 3 and the hemming lower die 4 begin to close the mold, and the hemming press body 32 moves downward to first contact the edge of the bin cover workpiece 5 and press it to fix it on the hemming support platform 42, and the hemming groove 321 on the outer side of the bottom end of the hemming press body 32 and the hemming protrusion 42 on the outer side of the top end of the hemming support platform 42 are formed. 1, the bending deformation inside the rear edge of the pre-flanged edge of the bin cover workpiece 5 is constrained and clamped, and the rear edge of the pre-flanged edge of the bin cover workpiece 5 extends out of the outer surface of the stacking press body 32 and the stacking support platform 42, and then the stacking insert 33 moves downward, and the arc-shaped cutting edge 331 inside the bottom end of the stacking insert 33 is used to squeeze the rear edge of the pre-flanged edge of the bin cover workpiece 5, and under the constraints of the stacking protrusion 421 on the outer side of the top of the stacking support platform 42 and the stacking groove 321 on the outer side of the bottom end of the stacking press body 32, the rear edge of the pre-flanged edge of the bin cover workpiece 5 is folded and pressed into the stacking groove 321 to complete the stacking. A spring can be arranged between the stacking press body 32 and the stacking upper die 3, and the stacking press body 32 is pushed toward the stacking lower die 4 by the spring, so that the stacking press body 32 cooperates with the stacking support platform 42 to press and fix the bin cover workpiece 5, and then the stacking insert 33 moves downward.

[0035] The description of the present invention is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the invention to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for particular uses.

Claims

1. The 180-degree hemming high-efficiency processing device for automobile engine compartment cover is used to perform hemming processing on the compartment cover workpiece after being processed by the drawing device, trimming device and punching device. It is characterized by: It includes a pre-flanging device for pre-flanging the edge of the bin cover workpiece, and a stacking device for stacking the pre-flanged portion of the bin cover workpiece after being processed by the pre-flanging device; The pre-flanging device comprises a pre-flanging upper die and a pre-flanging lower die which cooperate with each other, a pre-flanging upper cavity and a pre-flanging lower cavity are respectively arranged between the pre-flanging upper die and the pre-flanging lower die, a pre-flanging positioning base column which cooperates with the punching hole on the bin cover workpiece is arranged in the pre-flanging lower cavity, a pre-flanging boss corresponding to the edge of the bin cover workpiece is also arranged in the pre-flanging lower cavity, a pre-flanging punch is protruding from the upper surface of the pre-flanging boss, an inner mold surface is arranged on the inner side of the pre-flanging punch, and the outer side of the pre-flanging punch is an inclined outer mold surface, and the outer mold surface is inclined outward and downward; the pre-flanging A bending arc surface connecting the inner die surface and the outer die surface is arranged at the top of the edge punch; a pre-flanging pressing body is slidably arranged in the pre-flanging upper cavity to press and fix the edge of the bin cover workpiece on the pre-flanging boss, a bending groove is arranged on the outer side of the bottom end of the pre-flanging pressing body, a bending surface matching the inner die surface is arranged in the bending groove, and a bending surface corresponding to the bending arc surface is arranged on the top of the bending groove; a pre-flanging insert is arranged on the outer side of the pre-flanging pressing body in the pre-flanging upper cavity, and a bending inclined surface corresponding to the outer die surface is arranged on the inner side of the bottom end of the pre-flanging insert; The stacking device comprises an upper stacking die and a lower stacking die that cooperate with each other, an upper stacking cavity and a lower stacking cavity are respectively arranged between the upper stacking die and the lower stacking die, and a stacking positioning base column that cooperates with the punching hole on the bin cover workpiece is arranged in the lower stacking cavity; a stacking support platform corresponding to the edge of the bin cover workpiece is also arranged in the lower stacking cavity; a stacking pressing body that is slidably arranged in the upper stacking cavity to press and fix the edge of the bin cover workpiece on the stacking support platform is arranged, and a stacking groove that can accommodate the edge of the bin cover workpiece after bending is arranged on the outer side of the bottom end of the stacking pressing body in the upper stacking cavity, and a stacking insert is arranged on the outer side of the stacking insert body in the upper stacking cavity, and the inner side of the stacking insert is fitted with the outer side of the stacking pressing body, and an arc cutting edge is arranged on the inner side of the bottom end of the stacking insert; a stacking protrusion that cooperates with the stacking groove is arranged on the outer side of the top end of the stacking support platform; The inner mold surface includes an upper mold plane vertically arranged on the inner upper part of the pre-flanging punch, and an arc guide surface is arranged between the bottom of the upper mold plane and the upper surface of the pre-flanging punch; the inner and outer ends of the bending arc surface are respectively connected to the upper mold plane and the top of the outer mold surface; the outer mold surface is inclined outward and downward at an angle of 60°.

2. The 180-degree hemming efficient processing device for automobile engine compartment cover according to claim 1, characterized in that: The outer surface of the edge folding pressing body and the outer surface of the edge folding supporting platform are arranged flush with each other.

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