Research of Complex Plate-Type Cam Processing Based on MasterCAM

2011 ◽  
Vol 421 ◽  
pp. 625-629
Author(s):  
Ling Liu ◽  
Li Zhang
Keyword(s):  
Tool Path ◽  
High Efficiency ◽  
Parametric Design ◽  
Automatic Generation ◽  
Control Device ◽  
Cnc Machining ◽  
Production Costs ◽  
Scale Production ◽  
Plate Type ◽  
Lower Production

Because of cam transmited the specificity of force and motion,they are widely used in various machinery campaigns equipment and automatic control device in order to implement the movement of all kinds laws.This article introduced the research status and prospect of plate-type cam.MasterCAM served as a platform,to use their CAD capabilities and a mathematic analytic method to complete the parametric design of non-circular cam curve.Using the solid modeling completed the modeling function of cam.Using CAM functions of MasterCAM completed automatic generation of tool path,virtual simulation process and automatic generation of NC code.The design of the cam and CNC machining,high efficiency,sophisticated features that will help improve the manufacture of the cam quality,shorten product development cycles,lower production costs has a significant role for the formation of industrial scale production has great significance.

Tool Approach Directions for Machining Protrusion and Depression Features in an Object

1990 ◽  
Author(s):  
Chandrasekhar Karra ◽  
Thomas A. Phelps
Keyword(s):  
Product Development ◽  
Product Design ◽  
Tool Path ◽  
Low Cost ◽  
Production Costs ◽  
Competitive Market ◽  
Process Plans ◽  
Manufacturing Problems ◽  
Lower Production

Abstract The success of any industry in today’s highly competitive market is largely dependent on its ability to produce quality products, quickly and at low cost. Evaluating the effect of a product design on its manufacture is crucial in developing efficient designs. Any potential manufacturing problems detected at this stage can be corrected by modifying the design, leading to shorter product development cycles and lower production costs. This paper presents an algorithm to determine feasible tool approach directions. The algorithm is based on detecting if any part of the object obstructs the tool path. The basis for the algorithm is determining feasible approach directions and clearances around a planar polygonal face. The algorithm is applicable to both protrusions and depressions. The information is useful in performing manufacturability analysis of designs and develop process plans.

CNC Machining Based on UG for Stamping Die of Waveform Spring

2013 ◽  
Vol 457-458 ◽  
pp. 571-575 ◽  
Author(s):  
Hong Liu ◽  
Li Li Luo
Keyword(s):  
Large Scale ◽  
Tool Path ◽  
Complex Surface ◽  
Surface Modeling ◽  
Point Of View ◽  
Cnc Machining ◽  
Numerical Control ◽  
Scale Production ◽  
Geometry Model ◽  
Stamping Die

In this paper, for the large scale production demand of waveform spring, it combines UG advantage of complex surface modeling and computer numerical control (CNC) machining, uses this way of surface modeling method of bicubic B-spline to establish the stamping die geometry model for the need of waveform spring production. And from a process point of view, it analyzes the key issues of die CNC machining to achieve the selection of optimal small tool radius, tool path rational planning and rough finishing parameters set. The application results show that: the shape precision of die surface could meet the design requirements and could achieve the precision stamping of waveform spring.

Research and Development of the Cavity Mold CAD/CAM System Based on UG

2014 ◽  
Vol 543-547 ◽  
pp. 1500-1503
Author(s):  
Wei Jie Jia
Keyword(s):  
Computer Aided Design ◽  
High Efficiency ◽  
Cnc Machining ◽  
Production Costs ◽  
High Tech ◽  
Manufacturing Automation ◽  
Improve Product ◽  
Cad Cam ◽  
Traditional Manufacturing ◽  
Aided Design

As an important part of the computer information technology, computer-aided design and manufacturing (CAD/CAM) is a pivotal technology to realize manufacturing automation and to promote the technical progress of enterprises and to enhance technical innovative ability and the competitive ability of enterprise. At present, the development and application of CAD/CAM has become a crucial symbol of the technological and industrial modernization of a country. CAD/CAM is an epoch-making reform for traditional manufacturing. Mold is one of the industries that can exert the most benefit of CAD/CAM. Mold CAD/CAM is a crucial technology for traditional manufacturing. It is the system engineering with high-tech and high efficiency. It provides an effective auxiliary tool for enterprise. The engineers can improve product performance, mold structure, manufacturing technology and CNC machining and production procedure with the help of computer. It has become the consensus of the mold industry that mold CAD/CAM can shorten the manufacturing cycle, reduce production costs and improve product quality.

Adaptive spiral tool path generation for computer numerical control machining using point cloud

2021 ◽  
pp. 095440622199007
Author(s):  
Mandeep Dhanda ◽  
Aman Kukreja ◽  
SS Pande
Keyword(s):  
Tool Path ◽  
Cnc Machining ◽  
Numerical Control ◽  
Numerical Control Machining ◽  
Form Errors ◽  
Spiral Tool Path ◽  
Novel Method ◽  
Mesh Grid ◽  
Cloud Of Points ◽  
Cam Software

This paper reports a novel method to generate adaptive spiral tool path for the CNC machining of complex sculptured surface represented in the form of cloud of points without the need for surface fitting. The algorithm initially uses uniform 2 D circular mesh-grid to compute the cutter location (CL) points by applying the tool inverse offset method (IOM). These CL points are refined adaptively till the surface form errors converge below the prescribed tolerance limits in both circumferential and radial directions. They are further refined to eliminate the redundancy in machining and generate optimum region wise tool path to minimize the tool lifts. The NC part programs generated by our algorithm were widely tested for different case studies using the commercial CNC simulator as well as by the actual machining trial. Finally, a comparative study was done between our developed system and the commercial CAM software. The results showed that our system is more efficient and robust in terms of the obtained surface quality, productivity, and memory requirement.

Development of program-driven plug-in for conical counter-rotating twin screw based on SolidWorks

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Liqun Dong ◽  
Junwei Zhang ◽  
Liang Qin ◽  
Ping Xue ◽  
Yun Ma ◽  
...  
Keyword(s):  
Parametric Design ◽  
Cone Angle ◽  
Three Dimensional ◽  
Visual Basic ◽  
Automatic Generation ◽  
Three Dimensional Model ◽  
Modeling Process ◽  
Basic Language ◽  
Twin Screw ◽  
Visual Basic Language

Abstract Owing to the existence of the cone angle, the size of a conical counter-rotating twin screw continuously changes along the axis, so it is not easy to model using SolidWorks. In this study, the parametric design of the modeling process is completed based on the Visual Basic language and a program-driven method. Finally, the SolidWorks program plug-in and user interface are developed to complete the automatic generation of the three-dimensional model of a conical counter-rotating twin screw.

scholarly journals Efficient and large-area all vacuum-deposited perovskite light-emitting diodes via spatial confinement

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Peipei Du ◽  
Jinghui Li ◽  
Liang Wang ◽  
Liang Sun ◽  
Xi Wang ◽  
...  
Keyword(s):  
High Resolution ◽  
Large Scale ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Scale Production ◽  
Nonradiative Recombination ◽  
Large Area ◽  
Spatial Confinement ◽  
Light Emitting ◽  
Large Scale Production

AbstractWith rapid advances of perovskite light-emitting diodes (PeLEDs), the large-scale fabrication of patterned PeLEDs towards display panels is of increasing importance. However, most state-of-the-art PeLEDs are fabricated by solution-processed techniques, which are difficult to simultaneously achieve high-resolution pixels and large-scale production. To this end, we construct efficient CsPbBr3 PeLEDs employing a vacuum deposition technique, which has been demonstrated as the most successful route for commercial organic LED displays. By carefully controlling the strength of the spatial confinement in CsPbBr3 film, its radiative recombination is greatly enhanced while the nonradiative recombination is suppressed. As a result, the external quantum efficiency (EQE) of thermally evaporated PeLED reaches 8.0%, a record for vacuum processed PeLEDs. Benefitting from the excellent uniformity and scalability of the thermal evaporation, we demonstrate PeLED with a functional area up to 40.2 cm2 and a peak EQE of 7.1%, representing one of the most efficient large-area PeLEDs. We further achieve high-resolution patterned perovskite film with 100 μm pixels using fine metal masks, laying the foundation for potential display applications. We believe the strategy of confinement strength regulation in thermally evaporated perovskites provides an effective way to process high-efficiency and large-area PeLEDs towards commercial display panels.

A Generic, Geometric Approach to Accurate Machining-Error Predictions for 3-Axis CNC Milling of Sculptured Surface Parts: Part I — Modeling and Formulation

2006 ◽  
Author(s):  
Zezhong C. Chen ◽  
Wei Cai
Keyword(s):  
Tool Path ◽  
Cutting Tool ◽  
Geometric Model ◽  
Research Work ◽  
Geometric Approach ◽  
Cnc Machining ◽  
Sculptured Surface ◽  
Machining Error ◽  
Machining Errors ◽  
Tool Surface

In CNC machining, machining errors are usually caused by some of the sources such as cutting tool deflection, cutting tool wear, machine tool vibration, improper coolant/lubrication, and negative thermal effect. To increase product accuracy, much research has been carried out on the prediction of machining errors. However, in milling of sculptured surface parts, due to their curved shapes, the geometries of cutting tools do not match the parts’ surfaces well if the tools cut along the tool paths on the surfaces in a point-to-point way. As a consequence, machining error is inevitable, even if there is no other source of error in ideal machining conditions. To predict machining errors caused by this tool-surface mismatch, several methods have been proposed. Some of them are simple, and some represent the geometry of machined surfaces using cutter-swept surfaces. But none of these methods is accurate and practical. In this research work, a generic, geometric approach to predicting machining errors caused by the tool-surface mismatch is proposed for 3-axis sculptured surface milling. First, a new geometric model of the furrow formed by an APT tool moving between two neighboring cutter contact (CC) points is built. Second, the mathematical formula of cutting circle envelopes is derived. Then an algorithm for calculating machining errors in each tool motion is provided. Finally, this new approach is applied to two practical parts for the accurate machining-error predictions, and these predictions are then compared to the inaccurate predictions made by two established methods to demonstrate the advantages of this approach. This approach can be used in tool path planning for high precision machining of sculptured surface parts.

A Novel Method for Automated Tool Path Optimisation for CNC Machining Operations

2010 ◽  
Vol 166-167 ◽  
pp. 357-362
Author(s):  
Shahed Shojaeipour
Keyword(s):  
Tool Path ◽  
Target Location ◽  
Imaging System ◽  
Optimal Path ◽  
Digital Camera ◽  
Basic Program ◽  
Cnc Machining ◽  
Cnc Machine ◽  
Current Location ◽  
Tool Diameter

In this article, a new method for rapid tool movement in CNC machines is presented. Firstly, a single digital camera, installed on the Z-axis, captures the image of the workpiece on the work table. Image processing techniques, implemented using MATLAB, are then used to convert the image into a binary black and white image. This allows the locations of protruding edge sections on the workpiece, which could impede tool movement, to be identified. Quadtree decomposition is then performed on the binary image, and possible paths from the tool current location to its target location are found. These paths are then analysed based on the tool diameter clearance and the distance to the goal, and the shortest path with sufficient tool clearance is selected. A Visual Basic program then converts the selected path into G-code commands that provides instructions to the CNC machine tool such that this path is followed. With this method, the workpiece fixture location would not have to be precise as the imaging system would be able to automatically identify the target location with respect to the tool current location, along with the optimal path to reach it.

Automatic Generation of the Word in Tire Mold Side Plate Based on Font Vectorization

2013 ◽  
Vol 561 ◽  
pp. 559-563
Author(s):  
Hai Ming Hu ◽  
Hui Li ◽  
De Bao Yin
Keyword(s):  
Automatic Generation ◽  
Cnc Machining ◽  
Processing Technology ◽  
Side Plate ◽  
Rapid Tool

This paper introduces vectorization technology fromTrueType font for the text on the sidewall plate of the tire mold. TrueTypefont processing technology is the extraction of Windows functions and datatypes of the font outline. Call the API function to process the text in orderto achieve the CNC Machining of the text. It completes the tire mold word-processingsoftware on this basis. The software enables a variety of functions includingtext layout, font zoom, font spacing adjustment, font choice. It also providesa rapid tool for the quickly arranged and CNC machining of the text on thesidewall plate of the tire mold.

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