Punch forming die for automobile parts

Abstract

The utility model discloses an automobile part punch forming die, which belongs to the technical field of punching dies and comprises an upper die and a lower die, circular grooves are arranged on the upper die and the lower die, jacking ends are connected in the circular grooves in a vertically sliding manner, and the jacking ends are matched with the circular grooves in shape. The circular groove is used for wrapping the jacking end in a stamping state; a spring is arranged between the jacking end and the circular groove, the spring stores energy when the jacking end is pressed, and after the punching force is cancelled, the spring exerts force on the jacking end, so that the jacking end is higher than the circular groove and exerts acting force on the metal plate. By means of the design of the spring and the jacking end, automatic falling of the sheet metal part after stamping is completed is achieved, the jacking end is further pushed through the air pressure punching hole and the air pressure pipeline by means of air pressure generated by the air compressor, it is guaranteed that the sheet metal part can fall off smoothly, manual intervention is reduced, and production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of stamping die technology, and in particular relates to a stamping die for automotive parts. Background Technology

[0002] Automotive parts, also known as auto components, are an important part of the automotive industry. They are the various units that make up a car and the products that serve the car. They come in many varieties, such as engine parts, transmission parts, braking parts, steering parts, running system parts, ignition parts, fuel system parts, cooling system parts, lubrication system parts, and electrical instrument system parts. The following explanation will focus on sheet metal automotive parts.

[0003] Currently, the stamping production of automotive sheet metal parts is completed using a press. An upper die and a lower die are fixed on the upper and lower tables of the press, respectively. The upper die has stamping protrusions, and the lower die has stamping concave blocks. The sheet metal itself has an oil film, which both prevents rust and lubricates it. After stamping, due to the deformation caused by the stamping of the upper and lower dies during the forming process and the effect of the oil film on the outer surface of the sheet metal part, the sheet metal may adhere to the bottom surface of the upper die or the top surface of the lower die, resulting in a vacuum-induced adhesion. In this case, manual intervention is required to remove the stamped sheet metal part from the die, which not only increases labor costs but also reduces production efficiency.

[0004] Therefore, there is an urgent need to design a stamping die for automotive parts to solve the problem mentioned above where sheet metal, due to the stamping deformation of the upper and lower dies or partial vacuum gaps during the forming process, will adhere to the bottom surface of the upper die or the top surface of the lower die. Utility Model Content

[0005] To address the technical problem mentioned in the background art where sheet metal parts adhere to the bottom surface of the upper die or the top surface of the lower die after stamping, an automotive parts stamping die is provided. This die alleviates the excessive adhesion between the stamped sheet metal parts and the die to a certain extent, and uses external force to separate the sheet metal parts from the die, thereby solving the aforementioned problem.

[0006] To achieve the above objectives, the specific technical solution of the automotive parts stamping die of this utility model is as follows:

[0007] A stamping die for automotive parts includes an upper die and a lower die. Both the upper die and the lower die have circular grooves. A pressing end is slidably connected in the circular groove. The pressing end matches the shape of the circular groove. A spring is provided between the pressing end and the circular groove.

[0008] Furthermore, the circular groove includes a first circular groove and a second circular groove arranged sequentially. The first circular groove and the second circular groove are coaxially arranged. The diameter of the first circular groove is larger than the diameter of the second circular groove. A shoulder is provided at the connection between the first circular groove and the second circular groove. The inner sidewall of the second circular groove is slidably connected to the top pressing end. One end of the spring is connected to the shoulder, and the end of the spring away from the shoulder is connected to the top pressing end.

[0009] Furthermore, the top pressing end includes a rod body and a top head, the top head is fixedly connected to the rod body, the end of the spring away from the shoulder is connected to the top head, and the inner sidewall of the second circular groove is slidably connected to the rod body.

[0010] Furthermore, a clearance groove is provided on the second circular groove. The shape of the clearance groove matches the shape of the mandrel so that when the upper and lower dies are stamped into place, the mandrel is flush with the stamping surface of the upper die or the stamping surface of the lower die.

[0011] Furthermore, the top pressing end includes a rod body and a top head. The top head is fixedly connected to the rod body. A pneumatic punch is opened on the top head, and a pneumatic pipe is opened inside the rod body. One end of the pneumatic pipe is connected to the pneumatic punch, and the end of the pneumatic pipe away from the pneumatic punch is connected to an air compressor. The pneumatic pipe and the pneumatic punch together form a pressing pipeline. The opening direction of the pneumatic punch is located at the end of the top head away from the sheet metal.

[0012] Furthermore, a clearance groove is provided on the circular groove. The shape of the clearance groove matches the shape of the top head. When the clearance groove fits into the top head, the clearance groove seals the air pressure punch.

[0013] Furthermore, a conical arc surface is provided on the top, the air pressure punch is located on the conical arc surface, and a conical concave surface matching the conical arc surface is provided on the clearance groove, the clearance groove seals the air pressure punch through the conical concave surface.

[0014] Furthermore, multiple air pressure perforations are evenly distributed circumferentially on the conical arc surface.

[0015] The stamping die for automotive parts of this utility model has the following advantages:

[0016] This invention, through the design of a spring and a top-pressing end, ensures that under normal stamping conditions, the top-pressing end is positioned within the clearance groove. After the stamping pressure is released, the top-pressing end rebounds under the action of the spring, extending out of the clearance groove to act on the sheet metal part, thus lifting it up. This achieves automatic detachment of the sheet metal part from the mold after stamping. Furthermore, through pneumatic punching and pneumatic pipelines, the air pressure generated by an air compressor is used to increase the ejection force and prevent vacuum or liquid phase adsorption at the contact surface. The pneumatic punching further ensures that the sheet metal part can be smoothly detached, reducing manual intervention and improving production efficiency. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the stamping die structure for automotive parts according to this utility model;

[0018] Figure 2 This is a partial sectional view of the stamping die for automotive parts according to this utility model.

[0019] The markings in the diagram are as follows: 1. Upper mold; 2. Lower mold; 3. Circular groove; 301. First circular groove; 302. Second circular groove; 303. Shoulder; 304. Alternating groove; 305. Conical concave surface; 4. Top pressing end; 401. Rod body; 402. Top head; 403. Pneumatic punch; 404. Pneumatic pipe; 405. Conical arc surface; 5. Spring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0022] The following is a reference to the appendix. Figure 1 and attached Figure 2 This utility model describes a stamping die for automotive parts.

[0023] After the existing stamping dies are completed, the sheet metal is subjected to the stamping deformation of the upper and lower dies and the action of the stamping fluid during the forming process, resulting in a vacuum that causes it to adhere to the bottom surface of the upper die 1 or the top surface of the lower die 2. At this time, manual intervention is required to remove the stamped sheet metal parts from the dies, which not only increases labor costs but also reduces production efficiency.

[0024] Therefore, this utility model provides a stamping die for automotive parts, such as... Figure 1As shown, the device includes an upper mold 1 and a lower mold 2. Both the upper mold 1 and the lower mold 2 have circular grooves 3. A pressing end 4 is slidably connected within each circular groove 3. The pressing end 4 matches the shape of the circular groove 3 and is embedded in it. A spring 5 is provided between the pressing end 4 and the circular groove 3. When the pressing end 4 is subjected to external pressure, it retracts into the circular groove 3. During this retraction, the spring 5 is compressed. The elastic force generated by the compressed spring 5 creates a counterforce relative to the external pressure on the pressing end 4 after the external pressure disappears. When the pressure is low, the top pressing end 4 extends out of the circular groove 3, and the outer sheet metal has a certain outward supporting force, making it easy to remove the sheet metal part after it is formed. During the test piece debugging process, manual handling is required. After setting this structure, the intensity of manual handling is reduced, and the operation is more convenient and faster. When mass-producing sheet metal parts, robotic arms are often used to handle the materials. With this structure, the handling process is smoother, and there will be no situation where large external force is used to handle the parts due to fit problems. It also greatly helps to protect the outer surface of the parts and helps to improve the pass rate of sheet metal stamping.

[0025] Furthermore, in this application, the spring 5 can adopt a commonly used spring structure, or a nitrogen spring commonly used in the mold industry, or other elastic springs that can achieve pre-compression energy storage, all of which can achieve the functions of this application.

[0026] As a preferred option, such as Figure 2 As shown, the circular groove 3 includes a first circular groove 301 and a second circular groove 302 arranged sequentially. The first circular groove 301 and the second circular groove 302 are coaxially arranged. The diameter of the first circular groove 301 is larger than the diameter of the second circular groove 302, firstly for ease of processing, and secondly to ensure the guidance of the spring 5. A shoulder 303 is provided at the connection between the first circular groove 301 and the second circular groove 302. The inner sidewall of the second circular groove 302 is slidably connected to the top pressing end 4. The spring 5 is located in the first circular groove 301, and... One end of the spring 5 is limited by the shoulder 303, and the other end, that is, the end of the spring 5 away from the shoulder 303, is limited by the T-shaped structure of the pressing end 4. The cross-section of the pressing end 4 is an inverted T-shaped structure, and the lower end can be limited by one end of the spring 5. Specifically, the circular groove 3 abuts against the spring 5 through the shoulder 303, and the second circular groove 302 is coaxially arranged with the pressing end 4 and the two are clearance-fitted, and are slidably connected in the vertical direction. The shoulder 303 limits the pressing end 4.

[0027] Preferably, the top pressing end 4 includes a rod body 401 and a top head 402. The top head 402 is fixedly connected to the rod body 401. The end of the spring 5 away from the shoulder 303 contacts and is limited by one end of the top head 402. The inner sidewall of the second circular groove 302 is slidably connected to the rod body 401. Specifically, the top head 402 moves up and down to contact the sheet metal. Since the stamping force is much greater than the force of the spring 5, the end face of the top head 402 is always in contact with the sheet metal during the stamping process, and will not cause impact to the sheet metal. When the stamping force is small, the top head 402 is pushed out under the action of the spring 5. During this process, the top head 402 is always in contact with the sheet metal, and will not affect the forming of the sheet metal, thus ensuring the forming quality of the sheet metal. At the same time, it will not impact the outer surface of the sheet metal, and will not affect the appearance of the sheet metal. As the outer covering of automobiles, the appearance of sheet metal is also particularly important.

[0028] Preferably, the second circular groove 302 is provided with a clearance groove 304. The shape of the clearance groove 304 matches the shape of the top head 402. The space of the clearance groove 304 is larger than the outer shape of the top head 402, so that when the top head 402 is pressed during the stamping process, the clearance groove 304 can cover the top head 402. When the upper mold 1 and the lower mold 2 are stamped in place, under the action of external force, the top head 402 is finally flush with the stamping surface of the upper mold 1 or the stamping surface of the lower mold 2. The cooperation between the clearance groove 304 and the top head 402 firstly prevents the top head 402 from becoming an obstacle during the stamping process. The clearance groove 304 provides a sufficiently large clearance space. This structure firstly ensures the stamping quality of the sheet metal part after the structure is changed. Moreover, due to the setting of the spring, the top head 402 and the sheet metal are always in contact. The top pressing end 4 will not leave marks or damage the sheet metal part after the stamping is completed. The subsequent action of the top head 402 is to prepare for the subsequent sheet metal blanking.

[0029] Preferably, the top head 402 is provided with a pneumatic punch 403, and the rod body 401 is provided with a pneumatic pipe 404. One end of the pneumatic pipe 404 is connected to the pneumatic punch 403, and the end of the pneumatic pipe 404 away from the pneumatic punch 403 is connected to an external air compressor. The pneumatic pipe 404 and the pneumatic punch 403 together form a stamping pipeline. The opening direction of the pneumatic punch 403 is located at the end of the top head 402 away from the sheet metal. When the clearance groove 304 is in contact with the top head 402, the clearance groove 304 closes the pneumatic punch 403. Specifically, after stamping, the stamping pipe, together with the spring 5, removes the sheet metal part from the upper mold 1 or the lower mold 2 through the top pressing end 4. Specifically, the gas flowing from the air compressor accumulates at the air pressure punch 403 after passing through the air pressure pipe 404. When the gas pressure reaches a certain level, the accumulated gas drives the top end 402 to move away from the relief groove 304. At this time, with the help of the spring 5, a greater impact force can be obtained, and the gas can enter before the sheet metal and the mold, avoiding the vacuum state between the sheet metal and the mold. This increases the ejection force and avoids the vacuum. After setting this structure, the smooth separation of the sheet metal part from the upper mold 1 or the lower mold 2 is further guaranteed.

[0030] Preferably, the top 402 is provided with a conical arc surface 405, the air pressure punch 403 is located on the conical arc surface 405, and the clearance groove 304 is provided with a conical concave surface 305 that matches the conical arc surface 405. The clearance groove 304 closes the air pressure punch 403 through the conical concave surface 305. Specifically, the conical arc surface 405 and the conical concave surface 305 form an oblique gas channel. The sheet metal is deformed by the upper and lower molds 2 during the forming process. The deformation process is the stamping process. During this process, the upper mold 1 or lower mold 2 may be mutually attracted with the sheet metal part due to the oil film on the sheet metal part. When this liquid phase adsorption occurs, gas rushes into it through the oblique gas channel, thereby removing the sheet metal part from the liquid phase adsorption state between the upper mold 1 or lower mold 2, thereby further ensuring the separation effect between the sheet metal part and the upper mold 1 or lower mold 2.

[0031] Preferably, multiple air pressure punches 403 are evenly distributed circumferentially on the conical arc surface 405, so that air can be injected evenly between the sheet metal part and the upper and lower molds, avoiding the problem of vacuum adsorption or liquid phase adsorption between the contact surfaces.

[0032] In actual operation, when the upper mold 1 and the lower mold 2 stamp the sheet metal, the top pressing end 4 contacts the sheet metal. Under the action of the stamping force, the top pressing end 4 retracts into the circular groove 3 and becomes flush with the stamping surface of the upper mold 1 or the lower mold 2. At this time, the spring 5 contracts and stores energy. After the stamping is completed, the upper mold 1 and the lower mold 2 separate, and the spring 5 releases its elastic potential energy, causing the top pressing end 4 to extend, thereby causing the formed sheet metal part to separate from the upper mold 1 or the lower mold 2, thus preventing the formed sheet metal part from sticking to the upper mold 1 or the lower mold 2.

[0033] This invention achieves automatic detachment of sheet metal parts after stamping through the design of spring 5 and top pressure end 4. Furthermore, by using air pressure generated by an air compressor through air pressure punch 403 and air pressure pipe 404, the top pressure end 4 is further pushed, effectively avoiding vacuum and liquid phase adsorption, ensuring that the sheet metal parts can be detached smoothly, reducing manual intervention and improving production efficiency.

[0034] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An automobile part press forming die characterized by, The utility model provides a stamping device for sheet metal, which comprises an upper die and a lower die, and a circular groove is formed in each of the upper die and the lower die, a top pressing end head is slidably connected in the circular groove, the top pressing end head is matched with the shape of the circular groove, and the circular groove is used for covering the top pressing end head in a stamping state.

2. The press forming die for an automobile part according to claim 1, characterized by The circular groove comprises a first circular groove and a second circular groove arranged in sequence, the first circular groove is coaxially arranged with the second circular groove, the diameter of the first circular groove is larger than that of the second circular groove, a shoulder is arranged at the connection between the first circular groove and the second circular groove, the inner side wall of the second circular groove is slidably connected with the top pressing end head, one end of the spring is in contact with the shoulder and is limited, and the other end of the spring is in contact with the top pressing end head and is limited.

3. The press forming die for an automobile part according to claim 2, characterized by The top pressing end head is in an inverted T-shaped structure, comprises a rod body and a top head, the top head is fixedly connected with the rod body, one section of the rod body is slidably connected with the second circular groove, and the spring is coaxially arranged on one section of the rod body.

4. The press forming die for an automobile part according to claim 3, characterized by An avoiding groove is formed in the second circular groove, the avoiding groove is matched with the shape of the top head, so that the avoiding groove covers the top head when the upper die and the lower die are stamped to a position, and the top head is flush with the stamping surface of the upper die or the stamping surface of the lower die.

5. The press forming die for an automobile part according to claim 1, wherein The top pressing end head comprises a rod body and a top head, the top head is fixedly connected with the rod body, an air pressure hole is formed in the top head, an air pressure pipeline is formed in the rod body, one end of the air pressure pipeline is in communication with the air pressure hole, the other end of the air pressure pipeline is in communication with an external air compressor, the air pressure pipeline and the air pressure hole jointly form a stamping pipeline, and the opening direction of the air pressure hole is located at the end of the top head away from the sheet metal.

6. The press forming die for an automobile part according to claim 5, wherein An avoiding groove is formed in the circular groove, the avoiding groove is matched with the shape of the top head, and the avoiding groove seals the air pressure hole when the avoiding groove is attached to the top head.

7. The press forming die for an automobile part according to claim 6, wherein A conical arc surface is arranged on the top head, the air pressure hole is located on the conical arc surface, a conical concave surface matched with the conical arc surface is formed in the avoiding groove, and the avoiding groove seals the air pressure hole through the conical concave surface.

8. The press forming die for an automobile part according to claim 7, characterized by The air pressure hole is circumferentially distributed on the conical arc surface.

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