Automobile panel drawing die

Abstract

The utility model discloses an automobile covering piece draw -die, and the utility model relates to draw -die technical field. The automobile covering piece draw -die includes the bottom plate, and the top of bottom plate is provided with the forming mechanism for punching the metal sheet, and the forming mechanism includes: limiting component, including the limiting frame fixed mounting in the bottom plate center, the inside of limiting frame is hibridly installed with the support plate, the top of limiting frame is fixedly installed with the bottom die, and after processing, the upward thrust of compressed air in piston pipe is evenly used to four piston rod bottoms, and the piston rod is pushed and moves up synchronously, and then drives the synchronous rising of limiting frame four corners, and the sliding fit of limiting frame through nylon sleeve pipe and limiting column can limit the moving track of limiting frame, avoids the inclination when it moves up and down, and ensures that limiting frame always moves stably, finally, the synchronous jacking of limiting frame makes the forming piece, and the forming piece is evenly stressed, effectively prevents the deformation problem caused by uneven local stress.

Description

Technical Field

[0001] This utility model relates to the field of drawing die technology, specifically to a drawing die for automotive body panels. Background Technology

[0002] Automotive body panel drawing dies are used to manufacture automotive body panels. They can be used to shape automotive body panels by stretching or drawing metal materials. These dies are commonly used to produce exterior automotive body panels, such as body sheet metal parts, doors, and hoods. Through drawing dies, metal materials can be processed into the required shapes and sizes to meet the needs of automotive manufacturing.

[0003] The existing utility model patent with announcement number CN223352714U discloses a material-easy-to-receive automotive body panel drawing die, which relates to the field of drawing die technology. It includes a die cavity, a first punch below the die cavity, a base plate below the first punch, and a connecting groove through the center of the top surface of the first punch. A second punch is movably connected to the inner wall of the connecting groove. This utility model places the blank on the first punch, and then uses an external hydraulic cylinder to press the die cavity, while simultaneously moving the first punch downwards to make the second punch protrude from the connecting groove. The blank is drawn and formed by the closing of the die cavity, the first punch, and the second punch. After forming, the die cavity is lifted to separate the die. The second punch separates from the formed part in the connecting groove by the rebound of the first punch. With the lifting of the top block by the first spring, the shaped part is ejected and separated from the first punch, thus facilitating the operator to quickly remove the shaped part.

[0004] In the aforementioned drawing die, the ejector block relies on the rebound of the first spring to achieve the ejection action. If there is a deviation in the elastic coefficient of the first spring on both sides, or if the sliding fit clearance between the ejector block and the first shrinkage groove is uneven, it will cause the ejector blocks on both sides to rise asynchronously. This may cause the cover part to be subjected to unbalanced force, resulting in local deformation and affecting product accuracy. At the same time, the inner wall of the first shrinkage groove and the ejector block are in sliding fit. During the drawing process, metal chips will be generated. These chips are easy to accumulate in the fit clearance between the first shrinkage groove and the ejector block. After long-term operation, the ejector block will not be able to extend and retract smoothly, or even become stuck. It will not only lose its ejection function, but may also hinder the closing of the first punch and the second punch because the ejector block cannot retract, causing damage to the die structure. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a drawing die for automotive body panels, which solves the problems of debris causing the top block to jam and the top block's inability to move synchronously, leading to product deformation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A drawing die for automotive body panels includes a base plate, and a forming mechanism is disposed above the base plate for stamping metal sheets. The forming mechanism includes:

[0007] The limiting assembly includes a limiting frame fixedly installed at the center of a base plate, a support plate fitted inside the limiting frame, a bottom mold fixedly installed above the limiting frame, a limiting frame sleeved on the outside of the bottom mold, nylon sleeves inserted at the four corners of the limiting frame, limiting posts inserted inside the nylon sleeves, a side plate movably installed above the limiting frame, support springs inserted on both sides of the side plate, guide posts fixedly installed at the four corners of the base plate, linear bearings inserted outside the guide posts, and a moving mold fixedly installed outside the linear bearings.

[0008] The springback assembly is used to reset the limit frame and lift the raw material from above the bottom mold.

[0009] Preferably, the rebound assembly includes limiting tubes fixedly installed at the four corners of the base plate, a piston tube fixedly installed inside the limiting tube, a piston rod fitted inside the piston tube, a rubber ring fitted outside the piston rod, a rubber plug fixedly installed at the bottom of the piston rod, a sealing gasket inserted through the outside of the piston rod, and a limiting ring sleeved on the top of the piston tube.

[0010] Preferably, the bottom of the bottom mold is fixedly connected to the support plate, the support plate is installed equidistantly inside the limiting frame, the edge of the bottom mold does not contact the inner wall of the limiting frame, and the limiting frame is slidably connected to the limiting post through a nylon sleeve.

[0011] Preferably, the side plate and the limiting frame are slidably connected, and one side of the side plate is in contact with the limiting frame. The supporting spring is sleeved on the outside of the columnar structure at both ends of the side plate, and the moving mold is slidably connected to the guide column through a linear bearing.

[0012] Preferably, the rebound assembly is located at the four bottom corners of the limiting frame, the piston tube is connected to the limiting tube through a threaded structure, and the piston rod and the piston tube form a sliding connection.

[0013] Preferably, the rubber ring is fitted and installed on the outside of the disc-shaped structure at the bottom of the piston rod, and its outer edge contacts the piston tube. The side of the rubber plug contacts the inner wall of the piston tube. The limiting ring is connected to the piston tube through a threaded structure. The sealing gasket is installed on the top of the piston tube through a limiting tube.

[0014] Beneficial effects

[0015] This utility model provides a drawing die for automotive body panels. Compared with the prior art, it has the following advantages:

[0016] (1) The automotive body panel drawing die effectively avoids jamming caused by debris through multiple sealing and wear-resistant structure. First, the limiting ring in the springback assembly is fixed to the piston tube by a threaded structure, which can accurately position the installation position of the sealing gasket, so that the sealing gasket fits tightly against the outside of the piston rod, forming the first line of protection and directly blocking the metal debris generated during the drawing process from entering the sliding fit gap between the piston rod and the piston tube; second, the rubber ring embedded on the outside of the piston rod and the rubber plug fixed at the bottom further fill the gap between the piston rod and the piston tube, which not only enhances the airtightness inside the piston tube, but also prevents small debris from being embedded in the sliding gap; in addition, the sliding fit between the limiting frame and the limiting post relies on the nylon sleeve. The nylon sleeve itself has good wear resistance and self-lubrication, which can reduce the scraping of the sliding structure by debris, and at the same time prevent the accumulation of debris on the mating surface. The combined effect of multiple structures completely cuts off the path of debris entering the sliding gap, thereby preventing jamming.

[0017] (2) The automotive body panel drawing die, through symmetrical layout and uniform force design, ensures that the top block (limiting frame) moves synchronously and avoids product deformation. On the one hand, the spring-loaded components are evenly set at the four corners of the bottom of the limiting frame, and the four piston tubes are connected to the corresponding limiting tubes through threaded structures. During installation, the initial height of the four spring-loaded components is consistent. During the downward movement of the limiting frame, its four corners are evenly stressed and press down the four piston rods synchronously. Due to the uniform air pressure in the piston tubes, the downward resistance of each piston rod is consistent, achieving synchronous downward movement. After processing, the upward thrust generated by the compressed air in the piston tubes is evenly applied to the bottom of the four piston rods, pushing the piston rods to move upward synchronously, thereby driving the four corners of the limiting frame to rise synchronously. On the other hand, the limiting frame, through the sliding cooperation between the nylon sleeve and the limiting post, can limit the movement trajectory of the limiting frame and prevent it from tilting when moving up and down, ensuring that the limiting frame always moves smoothly. Finally, the limiting frame synchronously lifts the formed part, so that the formed part is subjected to uniform force, effectively preventing deformation caused by uneven local force. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the side plate mounting structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the moving mold installation structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the rubber stopper installation structure of this utility model;

[0022] In the diagram: 1. Base plate; 2. Molding mechanism; 21. Limiting component; 211. Limiting frame; 212. Support plate; 213. Bottom mold; 214. Limiting frame; 215. Nylon sleeve; 216. Limiting post; 217. Side plate; 218. Support spring; 219. Guide post; 2110. Linear bearing; 2111. Moving mold; 22. Springback component; 221. Limiting tube; 222. Piston tube; 223. Piston rod; 224. Rubber ring; 225. Rubber plug; 226. Sealing gasket; 227. Limiting ring. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a drawing die for automotive body panels includes a base plate 1, and a forming mechanism 2 is arranged above the base plate 1 for stamping metal sheets. The forming mechanism 2 includes:

[0025] The limiting assembly 21 includes a limiting frame 211 fixedly installed at the center of the base plate 1. A support plate 212 is fitted inside the limiting frame 211. A bottom mold 213 is fixedly installed above the limiting frame 211. A limiting frame 214 is sleeved on the outside of the bottom mold 213. Nylon sleeves 215 are inserted through the four corners of the limiting frame 214. Limiting posts 216 are inserted through the inside of the nylon sleeves 215. A side plate 217 is movably installed above the limiting frame 214. Support springs 218 are inserted through the two sides of the side plate 217. Guide posts 219 are fixedly installed at the four corners of the base plate 1. Linear bearings 2110 are inserted through the outside of the guide posts 219. A moving mold 2111 is fixedly installed on the outside of the linear bearing 2110. The bottom of the bottom mold 213 is fixedly connected to the support plate 212. The support plate 212 is equidistantly installed inside the limiting frame 211. The edge of the bottom mold 213 does not contact the inner wall of the limiting frame 214. The limiting frame 214 is slidably connected to the limiting post 216 through the nylon sleeve 215. The side plate 217 is slidably connected to the limiting frame 214, and one side of the side plate 217 is in contact with the limiting frame 214. The support spring 218 is sleeved on the outside of the columnar structure at both ends of the side plate 217. The moving mold 2111 is slidably connected to the guide post 219 through the linear bearing 2110.

[0026] Specifically, the limiting frame 211 and the support plate 212 can support the bottom mold 213. The side plates 217 around the limiting frame 214 are located above the top surface of the limiting frame 214 without external force, which can limit the position of the sheet material. After the top of the side plate 217 contacts the moving mold 2111, it can press down the side plate 217 and squeeze the support spring 218. After the moving mold 2111 contacts the limiting frame 214, it can clamp the sheet material. As the moving mold 2111 continues to move down, it will drive the limiting frame 214 to move down until the moving mold 2111 and the bottom mold 213 clamp the sheet material, and the sheet is formed by pressure.

[0027] The springback assembly 22 is used to drive the limiting frame 214 to reset and lift the raw material from above the bottom mold 213. The springback assembly 22 includes limiting tubes 221 fixedly installed at the four corners of the base plate 1. A piston tube 222 is fixedly installed inside the limiting tube 221. A piston rod 223 is fitted inside the piston tube 222. A rubber ring 224 is fitted outside the piston rod 223. A rubber plug 225 is fixedly installed at the bottom of the piston rod 223. A sealing gasket 226 is inserted and installed on the outside of the piston rod 223. A limiting sleeve is fitted on the top of the piston tube 222. Position ring 227 and spring-loaded assembly 22 are located at the four corners of the bottom of limit frame 214. Piston tube 222 is connected to limit tube 221 through threaded structure. Piston rod 223 and piston tube 222 form a sliding connection. Rubber ring 224 is fitted and installed on the outside of the bottom disc structure of piston rod 223, and its outer edge contacts piston tube 222. Rubber plug 225 has its side in contact with the inner wall of piston tube 222. Limit ring 227 is connected to piston tube 222 through threaded structure. Sealing gasket 226 is installed on top of piston tube 222 through limit tube 221.

[0028] Specifically, the rebound assembly 22 can retract synchronously as the moving mold 2111 drives the limiting frame 214 to move downward. The piston rod 223 will move downward, and the gap between the piston rod 223 and the piston tube 222 will be filled by the rubber ring 224 and the rubber plug 225, so that the air in the bottom space of the piston tube 222 is compressed. The limiting ring 227 can restrict the position of the sealing gasket 226. The sealing gasket 226 can prevent debris from entering the gap between the piston rod 223 and the piston tube 222. At the same time, the contents not described in detail in this specification are all prior art known to those skilled in the art.

[0029] During operation, the metal sheet material is first placed between the bottom mold 213 and the limiting frame 214. The bottom mold 213 is fixed above the limiting frame 211, and the bottom of the bottom mold 213 is fixedly connected to the support plate 212 embedded inside the limiting frame 211, providing stable support for the bottom mold 213. Then, the moving mold 2111 moves downward along the guide posts 219 fixed at the four corners of the bottom plate 1 through the linear bearing 2110 fixed on the outside. The moving mold 2111 first contacts the side plate 217 movably installed above the limiting frame 214. As it continues to move downward, it presses down on the side plate 217, causing the side plate 217 to slide along the limiting frame 214 and squeeze the support springs 218 inserted on both sides. When the moving mold 2111 and the limiting frame 214 are in contact, the two clamp the metal sheet material together. The moving mold 2111 continues to move downward, driving the limiting frame 214. The nylon sleeves 215, installed through its four corners, slide downwards along the limiting post 216. Simultaneously, the four bottom corners of the limiting frame 214 press down on the piston rod 223 of the rebound assembly 22, causing the piston rod 223 to move downwards within the piston tube 222 fixed inside the limiting tube 221. The rubber ring 224 fitted on the outside of the piston rod 223 and the rubber plug 225 fixed at the bottom respectively adhere to the inner wall of the piston tube 222, sealing and compressing the air at the bottom of the piston tube 222. The limiting ring 227 fitted above the piston tube 222 is fixed at the position of the sealing gasket 226 inserted on the outside of the piston rod 223. When the moving mold 2111 and the bottom mold 213 are fully fitted, completing the drawing and forming of the metal sheet, the moving mold 2111 moves upwards along the guide post 219. The support spring 218 loses pressure and rebounds, pushing the side plate 217 back to its original position. Simultaneously, the piston tube 222... The compressed air generates an upward thrust, pushing the piston rod 223 upward, which in turn drives the limit frame 214 to reset upward simultaneously, lifting the formed automotive body panel from the bottom mold 213 for easy removal, thus completing one drawing process.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] 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 drawing die for automotive body panels, comprising a base plate (1), characterized in that: A forming mechanism (2) is provided above the base plate (1) for stamping metal plates. The forming mechanism (2) includes: The limiting component (21) includes a limiting frame (211) fixedly installed at the center of the base plate (1). A support plate (212) is fitted inside the limiting frame (211). A bottom mold (213) is fixedly installed above the limiting frame (211). A limiting frame (214) is sleeved on the outside of the bottom mold (213). Nylon sleeves (215) are inserted through the four corners of the limiting frame (214). Limiting posts (216) are inserted through the inside of the nylon sleeves (215). A side plate (217) is movably installed above the limiting frame (214). Support springs (218) are inserted through the two sides of the side plate (217). Guide posts (219) are fixedly installed at the four corners of the base plate (1). Linear bearings (2110) are inserted through the outside of the guide posts (219). A moving mold (2111) is fixedly installed on the outside of the linear bearings (2110). The springback assembly (22) is used to drive the limit frame (214) to reset and lift the raw material from above the bottom mold (213).

2. The automotive body panel drawing die according to claim 1, characterized in that: The rebound assembly (22) includes limiting tubes (221) fixedly installed at the four corners of the base plate (1). A piston tube (222) is fixedly installed inside the limiting tube (221). A piston rod (223) is fitted inside the piston tube (222). A rubber ring (224) is fitted outside the piston rod (223). A rubber plug (225) is fixedly installed at the bottom of the piston rod (223). A sealing gasket (226) is inserted through the outside of the piston rod (223). A limiting ring (227) is sleeved on the top of the piston tube (222).

3. The automotive body panel drawing die according to claim 1, characterized in that: The bottom of the bottom mold (213) is fixedly connected to the support plate (212). The support plate (212) is installed equidistantly inside the limiting frame (211). The edge of the bottom mold (213) does not contact the inner wall of the limiting frame (214). The limiting frame (214) is slidably connected to the limiting post (216) through the nylon sleeve (215).

4. The automotive body panel drawing die according to claim 1, characterized in that: The side plate (217) and the limiting frame (214) are connected in a sliding manner, and one side of the side plate (217) is in contact with the limiting frame (214). The support spring (218) is sleeved on the outside of the columnar structure at both ends of the side plate (217). The moving mold (2111) is connected in a sliding manner with the guide post (219) through the linear bearing (2110).

5. The automotive body panel drawing die according to claim 2, characterized in that: The rebound assembly (22) is located at the four corners of the bottom of the limiting frame (214). The piston tube (222) is connected to the limiting tube (221) through a threaded structure. The piston rod (223) and the piston tube (222) form a sliding connection.

6. The automotive body panel drawing die according to claim 2, characterized in that: The rubber ring (224) is fitted and installed on the outside of the disc-shaped structure at the bottom of the piston rod (223), and its outer edge contacts the piston tube (222). The side of the rubber plug (225) contacts the inner wall of the piston tube (222). The limiting ring (227) is connected to the piston tube (222) through a threaded structure. The sealing gasket (226) is installed on the top of the piston tube (222) through the limiting tube (221).

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