| The traditional bagged cement loading way is mostly semi-automatic palletizing,relying on the manual stacker and loading.This loading process produces a lot of dust,which damages the health of the workers,and its production efficiency is low.So the research and development of the bag cement automatic loader is of great significance to the upgrading and development of the production technology in the cement industry.The automatic loading machine is designed like a drawer,which can dynamically adjust the palletizing scheme according to the width of the vehicle and the size of the cement package to realize the fast and dense palletizing effect of multiple packages.Based on the current status of domestic vehicles and bagged cement specifications,as well as the low strength of cement woven bags,this paper proposes a design scheme for the automatic truck loader in order to satisfy the automatic loading problem after the combination of any type of vehicle and any type of bag cement.The loading efficiency is improved by dropping multiple packages of cement at a time.1.The process of cement packages falling into the carriage is made up of"positioning movement-posture transformation-packet operation-falling and moving-back movement",which takes a lot of time and has low loading efficiency.Based on the design idea of "palletizing" loading,the design scheme of drawer type landing platform is proposed.To design the structure and parameter of the landing platform,should take full account of the requirements of "palletizing".To make sure of the width of the platform,should take into account the requirements of the package arrangement,the width of the carriage,the inlet channel and the density.,relating to the adaptability of the different types of vehicle and cement package;The length is related to the regularity of palletizing and the maximum number of cement packages that participate in the pack marshalling,and involves the overall loading efficiency;The height is related to the strength and stiffness of its own,affecting the height of the cement package falling into the carriage from the landing platform,and involves the smoothness of the movement.Therefore,adopt the upper type guide and drive for the landing platform to reduce its height and meet the requirement of the 2 times 2.2?3.0 meters in the width of the main car.Its width optimization target is between 1.6?2.0 meters,and the maximum ability to drop the 10?12 package cement requirements for one time,and its length is not less than 2.1 meters.Processed prototype test results are basically consistent with the initial design index.2.In order to achieve the set of multiple packages of cement on the landing platform to the designated position in the carriage,this paper designed the moving mechanism of falling cement packages.The layout and marshalling of the cement packages on the landing platform are arranged with the left front point or right front point of the platform.The landing platform driven by the moving mechanism moves smoothly from front to rear in the direction of the carriage length,making the packages smoothly fall into the designated position of the carriage.In order to alleviate the inertial impact during high-speed and heavy load operation,the AC servo system is selected as the driving mechanism to facilitate the control modeling.In order to ensure the reliability of the mechanism,the strength and rigidity of the guide rail,also called the frame body,was simulated and analyzed.Processed prototype test results are basically consistent with the initial design index.3.In order to solve the problem of automatic loading of any type of vehicle and size of' any bag cement,a structural scheme for setting up the cement packages along the width of the carriage 2 times is proposed.A horizontal moving mechanism is designed to drive the moving mechanism of falling cement packages to move along the width of the carriage,to realize the 2 precise landing location of the package marshalling on the left or right of the width direction of the carriage width,so the right and left 2 packet formation is stitching accurately to achieve a palletizing task.The package marshalling scheme designed for maximizing the full width of the carriages and achieving dense and stable loading requirements of the 2 criss cross arrangement,which based on the plan of "palletizing type planning" for automatic loader,was achieved because of the design of the horizontal moving mechanism.The design of the horizontal moving mechanism provides the feasibility for any type of vehicle and the intelligent loading truck with any size of bagged cement.The prototype test shows that the position control accuracy of the horizontal moving mechanism is better than 4mm,which fully meets the requirements.4.In order to ensure the stacking and loading density and stability,the cement packages in the pile must be arranged vertically and horizontally.Normally,the cement packages on the conveyor belt are longitudinally conveyed.Therefore,when the transverse package is needed,the cement bag must be changed before entering the platform.In this paper,a posture transformation mechanism consisting of a clad plate,a subpackage rod and a conveyor belt mechanism is designed,which controls the moving path of the cement package on the conveyor belt by the cylinder driving the cladding plate,and makes the cement bag rotate around 90 degrees by contact the subpackage rod,realizes the transformation from longitudinal to transverse.The design of the posture transformation mechanism makes the cement packages with a number of vertical and horizontal mixing along the width of the carriage to the maximum concentration of the carriages,and the horizontal and vertical overlapping dislocations in the stack layer or between layers provide a high stability of the palletizing.5.Based on the posture transformation mechanism been designed,which connects the front end of the basic conveyor belt and the rear end of the landing platform,arranged between the 1th floor and the 2nd floor,with its angle changed between 0?30 degrees.In order to prevent the cement package from slipping from the conveyor belt,there must be enough friction coefficient between the cement package and the belt.However,if the friction coefficient is too high,it will make it difficult to pass the post transformation mechanism and even deform the cement bag.Therefore,this paper uses the spring damping model to establish the dynamic model of the movement or rotation of the cement bag on the conveyer belt,and uses the ADMAS software to carry out the simulation analysis to study the influence of the friction coefficient on the posture transformation of the cement package.6.Based on the design of the main body,in order to realize the debugging of these institutions and the monitoring of stacking and loading process,a human-machine interface design scheme based on touch screen is put forward. |
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