Equipment for improving aluminum plate vehicle door lock hole punching forming process

Abstract

The invention provides equipment for improving an aluminum plate vehicle door lock hole punching forming process, the equipment comprises a base plate, a male die assembly, a female die assembly and a driving mechanism, and the female die assembly comprises a female die shell, a female die arranged in the female die shell, a base plate arranged at the lower end of the female die and an elastic piece arranged at the lower end of the base plate. According to the equipment for improving the punching forming process of the aluminum plate vehicle door lock hole, firstly, a door is grabbed to the equipment, and the male die assembly starts to move downwards along the sliding rail under the driving of the hydraulic cylinder; when the male die assembly is in contact with the automobile door and starts to pressurize, the elastic piece in the female die assembly is compressed to generate rebound force, downward pressure of the male die assembly is overcome, and impact force is relieved; at the moment, the male die assembly needs to overcome rebound force to continue pressurization and slowly continue to move downwards until the male die assembly makes contact with the female die assembly, the lock hole is punched out, the female die is elastically connected, the buffering effect can be achieved, and cracking caused by rapid hole diameter expansion due to the too fast punching process is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle door processing, and in particular to a device for improving the punching and forming process of a vehicle door lock hole of an aluminum plate. Background Art

[0002] Conventional process equipment uses a one-time punching process to achieve keyhole punching. This traditional process is to punch and form by moving the punch downward, and the bottom die uses a fixed die block. When the punch moves downward, the die can only passively withstand pressure.

[0003] The existing one-time punching forming technology will not cause any problems when punching door panels made of ordinary low-carbon steel plates, but it has the following four disadvantages when punching door panels made of aluminum plates: 1. After welding and punching, cracks of 1-2 mm may occur at the edge of the hole; 2. There are no cracks temporarily after welding and punching, but cracks will appear at the root of the hole after painting and baking; 3. The aperture after punching and forming under a certain pre-aperture diameter is too large to meet the technical requirements; 4. After each punching, a small amount of aluminum powder will remain in the die, which will be deposited after multiple punchings and cause cracks in the keyhole or appearance defects. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for improving the punching and forming process of aluminum plate door lock holes, so as to solve the problem that the hole edges are easily cracked when punching aluminum plate door panels.

[0005] The present invention provides an apparatus for improving the punching and forming process of door lock holes of aluminum plates, comprising a substrate, a punch assembly arranged on the upper side of the substrate, a die assembly arranged on the lower side of the punch assembly, and a driving mechanism arranged at the upper end of the punch assembly; the die assembly comprises a die shell, a die arranged in the die shell, a pad arranged at the lower end of the die, and an elastic member arranged at the lower end of the pad.

[0006] Furthermore, the elastic member is any one of a spring and a spring.

[0007] Furthermore, the male mold assembly is connected to the base plate via a slide rail, and the male mold assembly moves up and down along the slide rail.

[0008] Furthermore, the driving mechanism is a hydraulic cylinder.

[0009] Furthermore, it also includes a blowing device, which includes a cylinder and an air nozzle connected to the cylinder, and the air nozzle is arranged toward the die.

[0010] Furthermore, a plurality of positioning pins are provided at the upper end of the female mold shell, and the positioning pins are used to position the vehicle door.

[0011] Furthermore, the pad includes a supporting portion and a limiting portion provided at the lower end of the supporting portion, and an edge of the limiting portion abuts against the lower end edge of the die shell.

[0012] Furthermore, it also includes a base plate for fixing the springs, and positioning holes are provided at positions corresponding to each of the springs on the base plate.

[0013] Furthermore, a plurality of pressure sensors are evenly arranged on the upper end of the pad.

[0014] Furthermore, a flexible pad is provided at the upper end of the concave mold shell.

[0015] The above-mentioned equipment for improving the punching and forming process of the lock hole of the aluminum plate car door first grabs the door onto the equipment, and uses the positioning pin on the die shell to fix it. The punch assembly starts to move downward along the slide rail driven by the hydraulic cylinder; when the punch assembly contacts the car door and starts to apply pressure, the elastic part in the die assembly is compressed to generate a rebound force, which overcomes the downward pressure of the punch assembly and reduces the impact force; at this time, the punch assembly needs to overcome the rebound force and continue to apply pressure, and slowly continue to move downward until it contacts the die assembly and punches out the lock hole. The die adopts an elastic connection, which can play a buffering role to avoid the stamping process being too fast, resulting in rapid expansion of the aperture, thereby causing cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A side view of an apparatus for improving the punching and forming process of a door lock hole of an aluminum plate in a first embodiment of the present invention;

[0017] Figure 2 for Figure 1 A schematic cross-sectional view of the structure of a female die assembly in a device for improving the punching and forming process of a door lock hole of an aluminum plate in a first use state;

[0018] Figure 3 for Figure 1 A schematic cross-sectional view of the structure of the female die assembly in the device for improving the punching and forming process of the door lock hole of the aluminum plate in the second use state;

[0019] Figure 4 Schematic diagram of the cross-sectional structure of the female die assembly in the equipment for improving the punching and forming process of the door lock hole of the aluminum plate in the second embodiment of the present invention.

[0020] Description of main component symbols:

[0021]

[0022]

[0023] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0024] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] See also Figures 1 to 3 The present invention provides an apparatus for improving the punching and forming process of door lock holes of aluminum plates, comprising a substrate 10, a punch assembly 20 arranged on the upper side of the substrate 10, a die assembly 30 arranged on the lower side of the punch assembly 20, and a driving mechanism 40 arranged at the upper end of the punch assembly 20. The die assembly 30 comprises a die shell 31, a die 32 arranged in the die shell 31, a pad 33 arranged at the lower end of the die 32, and an elastic member 34 arranged at the lower end of the pad 33.

[0028] Specifically, in the embodiment of the present invention, the die shell 31 primarily serves to house and protect the die 32, while also providing installation space for the backing plate 33 and the elastic member 34. A plurality of locating pins 311 are provided at the upper end of the die shell 31 for positioning the vehicle door, ensuring accurate positioning of the door during the punching process, thereby ensuring the precision of the keyhole's molding. The number and distribution of the locating pins 311 are rationally designed based on the structure and size of the vehicle door to achieve reliable positioning of the vehicle door. The die 32 is a key component that cooperates with the punch assembly 20 to complete the punching operation, and its internal shape matches the shape of the keyhole. The die 32 is typically made of mold steel with high hardness and good wear resistance, and undergoes precision machining and heat treatment to ensure its dimensional accuracy and surface quality. During the punching process, the die 32 withstands the deformation pressure of the aluminum sheet and the impact force of the punch, and therefore needs to have sufficient strength and rigidity. The backing plate 33 is located at the lower end of the die 32 and serves to support and transmit pressure. The elastic member 34 is either a spring or a spring sheet, and is located at the lower end of the backing plate. During the punching process, when the punch assembly 20 contacts the vehicle door and begins to apply pressure, the elastic member 34 is compressed and generates a rebound force. This rebound force can overcome the downward pressure of the punch assembly 20, reducing the impact force. The punch assembly 20 needs to overcome the rebound force and continue to apply pressure, slowly moving downward until it contacts the die assembly 30, completing the punching of the keyhole. When a spring is selected as the elastic member, the spring must have a large elastic coefficient. Specifically, it must be able to effectively resist the pressure of the punch assembly 20, thus transforming the traditional door keyhole punching process from stamping to extrusion.

[0029] The above-mentioned equipment for improving the punching and forming process of the lock hole of the aluminum plate car door first grabs the door onto the equipment, and the punch assembly 20 starts to move downward under the drive of the driving mechanism 40; when the punch assembly 20 contacts the car door and starts to apply pressure, the elastic part in the die assembly 30 is compressed to generate a rebound force, which overcomes the downward pressure of the punch assembly 20 and reduces the impact force; at this time, the punch assembly 20 needs to overcome the rebound force and continue to apply pressure, and slowly continue to move downward until it contacts the die assembly 30 and punches out the lock hole. Because the die 32 adopts an elastic connection, it can play a buffering role to avoid the stamping process being too fast, resulting in rapid expansion of the aperture, thereby causing cracking.

[0030] Specifically, in this embodiment of the present invention, base plate 10 serves as the fundamental support component of the entire apparatus, providing a mounting platform for other components, such as the male die assembly 20 and female die assembly 30, ensuring the stability and relative positioning accuracy of each component during operation. Base plate 10 is typically made of a high-strength metal material, possessing sufficient strength and rigidity to withstand the various forces generated during operation.

[0031] In one embodiment of the present invention, the punch assembly 20 is connected to the base plate 10 via a slide rail 50, along which the punch assembly 20 moves up and down. Specifically, the punch assembly 20 is a key component for punching, and its shape and size are customized according to the design requirements of the door lock hole. The punch assembly 20 is connected to the base plate 10 via the slide rail 50 and is capable of moving up and down along the slide rail 50. Driven by the drive mechanism 40, the punch assembly 20 moves downward, punching the aluminum door sheet placed on the die assembly 30, thereby forming the lock hole.

[0032] In one embodiment of the present invention, the drive mechanism 40 is a hydraulic cylinder, which offers advantages such as high output force, smooth operation, and high control precision. Powered by a hydraulic system, the hydraulic cylinder precisely controls the speed and pressure of the punch assembly. During operation, the hydraulic cylinder, in response to commands from the control system, pushes the punch assembly downward along the slide rail, punching the aluminum door. Furthermore, the hydraulic cylinder can adjust its output force in real time based on feedback from the pressure sensor, ensuring the stability and reliability of the punching process.

[0033] It should be noted that, during the specific implementation process, the equipment needs to be equipped with a PLC controller to control the switching and operation of each electrical component.

[0034] One embodiment of the present invention further includes an air blowing device comprising a cylinder 60 and an air nozzle (not shown) connected to the cylinder 60, the air nozzle being positioned toward the die 32. After punching is complete, the cylinder 60 drives the air nozzle to blow air into the die 32 and the punched keyhole, removing aluminum chips and impurities generated during the punching process. This prevents residual aluminum chips from affecting the quality of the door and subsequent processing steps. The air blowing also cools the die 32, reducing its temperature and extending its service life.

[0035] In other embodiments of the present invention, the elastic member 34 can be replaced with other components with a buffering function. These components can be rubber products, such as rubber pads or rubber buffer blocks. Rubber has excellent elasticity and flexibility. When subjected to external impact, the molecular chains of rubber can undergo relative displacement, absorbing energy through stretching, twisting, and deformation, thereby providing a buffering effect. For example, in mechanical equipment, rubber pads are often placed between components and mounting surfaces to reduce vibration and shock during operation. Alternatively, silicone can be used. Silicone has a soft texture and a low elastic modulus, offering excellent energy-absorbing properties. Silicone can deform to a certain extent depending on the magnitude and direction of the external force, converting impact energy into its own elastic potential energy. Some protective covers for electronic products are made of silicone. When dropped or impacted, these covers can cushion the impact and protect the internal components. Alternatively, a hydraulic buffer can be used: it primarily consists of a cylinder, a piston, a piston rod, and a sealing device. When subjected to external force, the piston moves within the cylinder, forcing hydraulic oil through specific orifices or gaps, generating a damping force. This damping force dissipates the impact energy, slowly stopping the moving object and achieving a buffering effect. During elevator operation, hydraulic buffers are installed at the bottom of the elevator shaft. If the elevator malfunctions and plummets, the hydraulic buffers smoothly absorb the elevator's kinetic energy, preventing a violent collision. Elastic member 34 can also be a pneumatic buffer: its operating principle is similar to that of a hydraulic buffer, but it uses compressed gas as the buffering medium. Leveraging the compressibility of gas, when subjected to an impact, the gas is compressed, absorbing energy and slowing the object's movement. Robotic arms on automated production lines are often equipped with pneumatic buffers to reduce the impact force during movement, ensuring smooth and accurate operation. Elastic member 34 can also be made of polyurethane elastomer, which combines the advantages of rubber and plastic, offering high strength, good wear resistance, and elasticity. When subjected to an impact, polyurethane elastomers can quickly deform to absorb energy and quickly return to their original shape after the impact subsides. In the industrial field, polyurethane cushioning pads are often used in the hooks of lifting equipment and the bumpers of mining cars to effectively mitigate the impact of collisions between equipment. Polyurethane materials are also used in athletic shoes to provide excellent shock absorption for athletes.

[0036] In one embodiment of the present invention, the pad 33 includes a support portion 331 and a limiting portion 332 provided at the lower end of the support portion 331, and the edge of the limiting portion 332 abuts against the lower edge of the die shell 31. Through this structural design, the displacement of the pad 32 can be effectively limited, ensuring the stability of the pad 32 during operation. A plurality of pressure sensors (not shown) are evenly provided on the upper end of the pad 32 for real-time monitoring of the pressure applied to the aluminum plate during the punching process, and feeding back the pressure data to the control system. The control system adjusts the working parameters of the drive mechanism according to the pressure data to achieve precise control of the punching process.

[0037] In one embodiment of the present invention, see Figure 4 , further comprising a base plate 70 for securing the springs (elastic members 34). Positioning holes (not shown) are provided on the base plate 70 at positions corresponding to each of the springs. The positioning holes accurately secure the springs, preventing them from shifting or misaligning during operation and ensuring that the elastic members can stably perform their cushioning function. The base plate is typically made of a high-strength metal material, possessing sufficient strength and rigidity to withstand the pressure of the springs.

[0038] In one embodiment of the present invention, a flexible pad (not shown) is provided at the upper end of the concave mold shell 31. The flexible pad can be made of a soft, elastic material, such as rubber or silicone. During the door positioning process, the flexible pad can closely adhere to the door surface, preventing hard contact between the door and the concave mold shell and scratching the door surface. It also provides a certain cushioning effect, further improving the accuracy and stability of door positioning.

[0039] The above-mentioned equipment for improving the punching and forming process of the lock hole of the aluminum plate car door first grabs the door onto the equipment, and uses the positioning pin 311 on the die shell 31 to position it. The punch assembly 20 starts to move downward along the slide rail 50 under the drive of the hydraulic cylinder (drive mechanism 40); when the punch assembly 20 contacts the car door and starts to apply pressure, the elastic part 34 in the die assembly 30 is compressed to generate a rebound force, which overcomes the downward pressure of the punch assembly 20 and reduces the impact force; at this time, the punch assembly 20 needs to overcome the rebound force and continue to apply pressure, and slowly continue to move downward until it contacts the die assembly 40 and punches out the lock hole. The die 32 adopts an elastic connection, which can play a buffering role to avoid the stamping process being too fast, resulting in rapid expansion of the aperture, thereby causing cracking.

[0040] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A device for improving the punching and forming process of door lock holes of aluminum plate, comprising a base plate, a male mold assembly provided on the upper side of the base plate, a female mold assembly provided on the lower side of the male mold assembly, and a driving mechanism provided on the upper end of the male mold assembly, characterized in that: The die assembly includes a die shell, a die arranged in the die shell, a backing plate arranged at the lower end of the die, and an elastic member arranged at the lower end of the backing plate.

2. The device for improving the punching and forming process of the door lock hole of the aluminum plate according to claim 1 is characterized in that: The elastic member is any one of a spring and a spring sheet.

3. The device for improving the punching and forming process of the door lock hole of aluminum plate according to claim 1 is characterized in that: The male mold assembly is connected to the base plate through a slide rail, and the male mold assembly moves up and down along the slide rail.

4. The device for improving the punching and forming process of the door lock hole of aluminum plate according to claim 1 is characterized in that: The driving mechanism is a hydraulic cylinder.

5. The device for improving the punching and forming process of the door lock hole of the aluminum plate according to claim 1 is characterized in that: It also includes a blowing device, which includes a cylinder and an air nozzle connected to the cylinder, and the air nozzle is arranged toward the die.

6. The device for improving the punching and forming process of the door lock hole of aluminum plate according to claim 1 is characterized in that: The upper end of the female mold shell is provided with a plurality of positioning pins, and the positioning pins are used to position the vehicle door.

7. The device for improving the punching and forming process of the door lock hole of aluminum plate according to claim 1 is characterized in that: The pad includes a supporting portion and a limiting portion provided at the lower end of the supporting portion, and an edge of the limiting portion abuts against the lower end edge of the die shell.

8. The device for improving the punching and forming process of the door lock hole of aluminum plate according to claim 2, characterized in that: It also includes a bottom plate for fixing the springs, and positioning holes are provided at positions of the bottom plate corresponding to each of the springs.

9. The device for improving the punching and forming process of the door lock hole of aluminum plate according to claim 1, characterized in that: A plurality of pressure sensors are evenly arranged on the upper end of the pad.

10. The device for improving the punching and forming process of door lock holes of aluminum plates according to claim 1, characterized in that: A flexible pad is provided at the upper end of the concave mold shell.

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