The Stamping Part Work Tool for Visual Grip Application Is Made And Used

The car factory body workshop automation of visual grip technology due to the existence of small investment and save on-piece workers and other advantages, recently in the domestic host plant promotion is relatively extensive, this paper introduces the visual grasping matching station equipment from design, production, operation to maintenance of the entire process, and marked a number of factors, through the control of the whole process, to ensure the implementation of visual grip in the body workshop.

With the rise of labor costs and the promotion of industry 4.0, various industries at home and abroad are promoting unmanned, automated production and logistics programs. In the automotive industry, with the maturity of automated welding and other processes, the current domestic and foreign vehicle manufacturers will further advance automation upstream, that is, to solve the automation of parts, in order to promote the solution of the production process of unmanned problems.

Part pick-and-place automation includes both automated packing and automated pick-up, respectively, for the robot to load parts into the station utensils and the robot to remove the parts from the station utensils. For automated boxing, such as stamping parts of the offline boxing, due to production flexibility, site and quality and other factors, the current host plant in China has not been promoted. But for automatic feeding, because each station in the body workshop can be flexible layout of robots according to the actual situation, the site and production flexibility has less impact, especially for the body workshop used stamping parts, to robot picking instead of manual picking, to solve the manual take parts beat high and poor ergonomics and other shortcomings, is currently a major host plant research a hot topic.

The success rate of automated pick-up is closely related to the absolute posture of the part next to the production line. The automatic pick-up has gone through two stages, the first stage for the robot grasper to use a fixed trajectory to grab parts from the station utensils, because the robot pick-up takes a fixed track, the part attitude requirements are higher, so the station utensil tolerances and parts in the station equipment activity space is small, to prevent the parts in the logistics process of the movement affecting the part posture and grasping. Therefore, fixed track grip mode is not conducive to the production and operation of station equipment, the cost is more expensive. At the same time, under the premise of manual packing, because the parts can move a small distance, but also not conducive to workers boxing, especially on the high punching line boxing, is a challenge.

The second stage is to take the active track grab part for the robot, that is, the automatic visual grab. The robot grip grips the camera and, with the assistance of the vision system, grab parts from the station utensils. Its workflow is to grab parts, the camera first to the part feature points (generally select part sharp corners and pin holes and other easy-to-identify feature points) to take pictures and compare with the standard attitude value of parts in the visual system, guide the robot to adjust the position, so as to achieve the part crawl. Compared with fixed track grip mode, the visual grip mode has relatively low attitude requirements for parts, lower requirements for station apparriage tolerances and part gaps, and is advantageable to the production of station apparriage and workers' boxing, so automatic grip mode with vision system is widely used at present.