KR-102962742-B1 - INTELLIGENT CAM DIE CONTROL APPARATUS

Abstract

The present invention relates to an intelligent cam die control device and is a technology for effectively solving the springback problem occurring in the forming process of ultra-high strength steel parts. This device consists of an upper die and a lower die, and the lower die includes a drive shaft assembly, a motor drive unit, a cam slide, a cam punch assembly, a slide plate, a displacement sensor, and a spring. A cam drive and an upper die are installed in the upper die to perform cooperative work with the lower die. This device measures the initial dimensions and deformation data of the molded part in real time using displacement sensors, and the central control unit calculates the correction amount based on this data to control the motor drive unit, thereby precisely adjusting the molding amount. The drive shaft assembly and rail system stably support the movement of the cam punch, ensuring precision and stability during the molding process. Additionally, a spring performs the function of returning the cam punch to its original position after the operation is completed. The intelligent cam die control device of the present invention moves away from conventional manual correction methods and solves springback problems through an automated correction system, enabling high-efficiency forming processes and precise quality control. This is suitable for forming operations of high-strength and difficult-to-form materials, such as eco-friendly automotive parts and battery cases.

Inventors

• 김경환

Dates

Publication Date

20260507

Application Date

20241226

Claims (7)

1. In an intelligent cam mold control device capable of springback compensation in a cam mold composed of an upper mold and a lower mold, A plurality of cam drives installed in the above-mentioned upper mold; A plurality of cam slides installed in the lower mold and capable of sliding movement by engaging with the plurality of cam drives; A plurality of cam punch assemblies connected to the above plurality of cam slides to press a molded product; A plurality of motor drive devices capable of controlling the movement of the plurality of cam punch assemblies; A plurality of drive shaft assemblies that control the pressing amount of the plurality of cam punch assemblies in real time and are connected by a screw shaft at a contact portion with a cam punch assembly located on a first rail or a second rail to move the cam punch assembly forward or backward; A lower die installed at the center of the lower die to support the molded product; A displacement sensor installed inside the lower die above to measure initial dimension and deformation data of the molded product; A central control device that calculates a correction amount based on data collected from the displacement sensor and material properties including the elastic modulus, thickness, strength, and elongation of the input material, and independently adjusts the position and forming amount of each cam punch assembly using the calculated correction amount; and It includes an input device that receives physical properties, such as the elastic modulus, thickness, strength, and elongation of the material, and transmits them to the central control device, The above central control device is an intelligent cam die control device capable of performing additional corrections in real time without manual work by automatically calculating the correction amount without interrupting the molding process when the final dimension of the molded product measured through the displacement sensor does not match the target dimension, and reflecting physical properties including the elastic modulus, thickness, strength, and elongation of the material in the correction amount, and controlling each motor drive device to precisely adjust the molding amount of the cam punch assembly.
2. In Article 1, The above lower mold includes a plurality of rails and a plurality of slide plates; An intelligent cam mold control device in which the plurality of drive shaft assemblies are guided in a horizontal direction by the plurality of rails and the movement of the plurality of slide plates is stably maintained.
3. In Article 1, An intelligent cam mold control device in which the lower mold further includes a plurality of springs to mitigate the impact of the plurality of cam punch assemblies.
4. In Article 1, The above displacement sensor measures the dimensions and deformation amount of a molded product in a non-contact manner, and is an intelligent cam die control device capable of transmitting measurement data to a central control unit to calculate the springback correction amount in real time.
5. In Article 1, The above central control device optimizes the correction amount based on the material property data of the input material, and is an intelligent cam die control device capable of correcting the distortion and asymmetric deformation of the molded product by individually controlling the plurality of cam punch assemblies.
6. delete
7. In Article 1, The above central control device controls the plurality of motor drive devices and the plurality of cam punch assemblies, and is an intelligent cam die control device capable of both integrated control, in which the plurality of cam punch assemblies operate under the same time and pressure conditions, and independent control, in which the position and molding amount of each cam punch assembly are independently adjusted.

Description

Intelligent Cam Die Control Apparatus The present invention relates to an intelligent cam die control device, and more specifically, to an intelligent cam die control device that effectively solves the springback problem occurring in the forming process of ultra-high strength steel parts through precise forming amount control and real-time correction based on motor drive. With the active development of eco-friendly vehicles, the application of parts utilizing 1.5 giga-grade ultra-high strength steel is increasing in order to enhance structural rigidity, ensure battery safety, and achieve weight reduction. However, there are difficulties in actual application of such ultra-high strength steel due to low formability and springback phenomena, and there is a problem where material variation between and within lots is higher than that of conventional materials due to complex design and manufacturing processes. Conventional methods for compensating for springback involved predicting the amount of springback through simulation and analysis during the product design phase, and reflecting this by designing the mold angle to be smaller than the actual product angle to achieve the desired dimensions after elastic recovery. Additionally, a method was utilized in which displacement sensors were installed to measure the initial shape deformation, the press operation was temporarily paused, and the forming amount was controlled by adjusting the cam's inclination angle. However, these existing methods suffer from inefficiency, as they require manual manipulation of the mechanism to compensate for springback after initial shape measurement, necessitating the suspension of press operation. Additionally, the complex structure presented difficulties in terms of design and manufacturing. FIG. 1 is a drawing of an upper die and a lower die of an intelligent cam mold control device according to one embodiment of the present invention when molding is performed by the upper die and the lower die being in close contact. FIG. 2 is a drawing of the initial state in which the upper and lower molds of an intelligent cam mold control device according to one embodiment of the present invention are separated. FIG. 3 is a partial drawing illustrating a drive shaft assembly and a cam punch assembly of an intelligent cam mold control device according to one embodiment of the present invention. FIG. 4 is a partial drawing illustrating the slide plate and rail of an intelligent cam mold control device according to one embodiment of the present invention. FIG. 5 is a system configuration diagram of an intelligent cam mold control device according to one embodiment of the present invention. FIG. 6 is a flowchart showing the operation process of an intelligent cam mold control device according to one embodiment of the present invention. To fully understand the structure and effects of the present invention, preferred embodiments of the present invention are described with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms and various modifications can be made. The description of the embodiments is provided merely to ensure that the disclosure of the present invention is complete and to efficiently explain the scope of the invention to those skilled in the art to which the present invention pertains. FIG. 1 is a drawing of the upper and lower molds of an intelligent cam mold control device according to one embodiment of the present invention when forming is performed by being in close contact, and FIG. 2 is a drawing of the initial state in which the upper and lower molds of an intelligent cam mold control device according to one embodiment of the present invention are separated. Referring to FIGS. 1 and 2, an intelligent cam mold control device according to an embodiment of the present invention is composed of an upper mold (100) and a lower mold (200). The upper mold (100) includes a cam drive (110) and an upper die (120), and the lower mold (200) includes a drive shaft assembly (210), a screw (211), a motor drive unit (220), a cam guide (221), a cam slide (222), a cam punch assembly (223), a slide plate (230), a spring (233), a bottom plate (240), a lower die (250), a displacement sensor (251), and a lower die bottom structure (252). When the upper mold (100) descends and the upper die (120) installed at the center of the upper mold (100) meets the lower die (250) installed at the center of the lower mold (200), the cam drive (110) descends along the cam guide (221) and advances the slide plate (230) while pushing the cam slide (222). As a result, the cam punch assembly (223) comes into contact with the molded product (300) to perform the molding operation. Depending on the contact angle between the cam drive (110) and the cam slide (222), the upper mold (100) descends, and the force applied in the vertical direction is converted to the hor