A Part Feature Description Model for Process Planning of Rotational Parts

1989 ◽  
Author(s):  
H.-M. Rho ◽  
D. Sheen
Keyword(s):  
Process Planning ◽  
Machine Tools ◽  
Computer Software ◽  
Technical Information ◽  
Surface Shape ◽  
Machining Processes ◽  
Feature Description ◽  
Rotational Parts ◽  
Machining Operations ◽  
Part Feature

Abstract This study documents the development of the Automated Process And Sequence Selector (APASS) model and associated computer software. APASS can be effectively used to automate the selection of machine tools for rotational parts during the process planning procedure for these parts. The APASS model bases its machine tool decisions on part feature description, such as surface shape, technical information! and part header information. Data on the surface shape are transformed automatically based on conversion tables to output suggested machining processes and machine tools. These processes are further filtered by technical information contained within the master and machine files. The ultimate APASS output is a sequence of machining operations based on both the geometrical and dimensional tolerances of the part surfaces and the machine availability. The program has been written in MS PASCAL and currently run on IBM PC/AT compatible.

scholarly journals A Reliable Turning Process by the Early Use of a Deep Simulation Model at Several Manufacturing Stages

2017 ◽  
Author(s):  
Gorka Urbikain ◽  
Luis Norberto López De Lacalle ◽  
Mikel Arsuaga ◽  
Alvaro Alvarez ◽  
Miguel A. Alonso
Keyword(s):  
Machine Tools ◽  
Manufacturing Companies ◽  
Machining Processes ◽  
Knowledge Based ◽  
Direct Benefits ◽  
Definition Of ◽  
The Right ◽  
Machining Operations ◽  
Physical Laws ◽  
Manufacturing Problems

The future of machine tools will be dominated by highly flexible and interconnected systems, in order to achieve the required productivity, accuracy and reliability. Nowadays, distortion and vibration problems are easily solved in labs for the most common machining operations by using models based on equations describing the physical laws of the machining processes; however additional efforts are needed to overcome the gap between scientific research and the real manufacturing problems. In fact, there is an increasing interest in developing simulation packages based on “deep-knowledge and models” that aid machine designers, production engineers or machinists to get the best of the machine-tools. This article proposes a methodology to reduce problems in machining by means of a simulation utility, which uses the main variables of the system&process as input data, and generates results that help in the proper decision-making and machining planification. Direct benefits can be found in a) the fixture/clamping optimal design, b) the machine tool configuration, c) the definition of chatter-free optimum cutting conditions and d) the right programming of cutting toolpaths at the Computer Aided Manufacturing (CAM) stage. The information and knowledge-based approach showed successful results in several local manufacturing companies and are explained in the paper.

PMPS: A Prototype CAPP System for Parallel Machining

1996 ◽  
Vol 118 (3) ◽  
pp. 406-414 ◽  
Author(s):  
J. B. Levin ◽  
D. Dutta
Keyword(s):  
Process Planning ◽  
Machine Tools ◽  
Machining Accuracy ◽  
Next Generation ◽  
Computer Aided Process Planning ◽  
Cycle Times ◽  
The Past ◽  
Computer Aided ◽  
Machining Operations ◽  
New Generation

Parallel N.C. machines, also referred to as mill-turns, are a new generation of machine tools aimed at increasing machining accuracy and reducing part cycle times. In addition to their capacity to do both milling and turning, these next generation machines tools can perform multiple machining operations simultaneously, involving one or more parts at a time, and can completely finish a part (front and back) in a single setup. Parallel machining raises issues with respect to computer aided process planning which have not been dealt with in the past. In this paper, a prototype CAPP system called PMPS, for parallel machining, is described. First, we briefly highlight the new issues to be dealt with in process planning for parallel machining. Next, the architecture and details of PMPS, a generative CAPP system, is described. Finally, the implementation and results are discussed.

Computer Aided Process Planning for Machining the Gears

2011 ◽  
Vol 264-265 ◽  
pp. 1551-1556
Author(s):  
Deepak Byotra ◽  
Rajesh Kumar Bhushan
Keyword(s):  
Process Planning ◽  
Hybrid Approach ◽  
Machining Processes ◽  
Machining Time ◽  
Computer Aided Process Planning ◽  
Computer Aided ◽  
Set Up ◽  
Cutting Processes ◽  
Machining Operations ◽  
Grinding Operations

Bulk of power transmitting metal gears of machinery is produced by machining processes from cast, forged or hot rolled blanks. It includes a number of versatile machining operations that use a milling cutter, a multi tooth tool to produce a variety of configurations. The aim of the computer aided process planning (CAPP) is to develop a programme for milling cutting processes. This paper reveals the hybrid approach to computer aided process planning for milling and grinding operations on gear blank, so that the plan can be generated taking into account the availability of machines and the material. The developed computer aided process plan has reduced the set up time and machining time by 40.90 and 30.15 % respectively.

INTEGRATION OF PRODUCT AND PROCESS PLANNING BASED ON NEURAL NETWORKS IN COOPERATIVE DESIGN METHODOLOGY

2013 ◽  
Vol 12 (02) ◽  
pp. 107-129 ◽  
Author(s):  
C. NUMTHONG ◽  
S. TICHKIEWITCH
Keyword(s):  
Neural Networks ◽  
Process Planning ◽  
Machining Process ◽  
Machining Processes ◽  
Product Representation ◽  
Cooperative Design ◽  
Team Members ◽  
The Neural Networks ◽  
Rotational Parts ◽  
Product And Process

Integration of product representation and process planning is necessarily to couple features of product data and machining processes. The product representation and knowledge of design and process planning should be shared and distributed between a product designer and process planner. Cooperative design and process planning works are proposed in this paper in order to integrate and exchange information between team members to obtain the efficiency of product design and process planning. In addition, this paper presents the integration of product representation and process planning of rotational parts based on neural networks technique. The neural networks technique is used to contribute in selecting suitable machining process of rotational parts. In addition, we also present CoDeMo (Cooperative Designing Modeler). It is a platform using support cooperative methodology for integrating the rotational product representation and process planning. The case study is tested with a sample part from the exemplary company.

On the Effects of Parallelism on Computer-Aided Process Planning

1992 ◽  
Author(s):  
Jordan B. Levin ◽  
Debasish Dutta
Keyword(s):  
Process Planning ◽  
Machine Tools ◽  
Computer Integrated Manufacturing ◽  
Critical Function ◽  
Ongoing Research ◽  
Computer Aided Process Planning ◽  
New Class ◽  
Computer Aided ◽  
Machining Operations ◽  
New Machine

Abstract Computer-aided process planning is a critical function in the overall scheme of computer-integrated manufacturing (CIM). Progress in CIM is key to increased productivity. Furthermore, as new CIM systems evolve, the latest advancements from the constituent areas must be incorporated. Toward that end, our ongoing research deals with the development of methodologies to enable the inclusion of a new class of machine tools characterized by their ability to carry out machining operations in parallel. In this paper, we identify and elaborate on the effects of parallelism on computer-aided process planning, which are brought about by these new machine tools.

A Comparative Study of Tribological Behavior of Steel Sliding Against WC Under Mineral and Biodegradable Oil Lubrication

2012 ◽  
Author(s):  
Anup Darshan ◽  
UmaMaheshwera Reddy Paturi ◽  
Narala Suresh Kumar Reddy ◽  
Srinivasa Prakash Regalla
Keyword(s):  
Tribological Properties ◽  
Positive Impact ◽  
Research Work ◽  
Mineral Oil ◽  
Optical Microscope ◽  
Machining Processes ◽  
Alternative Source ◽  
Pin On Disc ◽  
Steel Disc ◽  
Machining Operations

Now a days for machining operations apart from good tribological properties, the lubricant is also expected to be non-hazardous and non-polluting. When considering the ecological and environmental aspects in machining processes, the use of biodegradable oil can be an alternative source of lubricant due to its positive impact to employee health and environmental pollution. In this regard, our research work uses vegetable based cutting fluids developed from canola and sunflower oil, in an attempt to provide an eco-friendly environment. Experiments are carried out on a pin-on-disc tribometer with tungsten carbide (WC) pin against AISI 4340 steel disc for different sliding times under different environments, thus simulating the machining environment. The tribological properties, wear and friction of vegetable based oils were comparatively investigated with a commercially available mineral oil. Wear tracks and roughness profiles of test specimens were compared by using optical microscope and profilometer respectively. Results indicated that vegetable based canola oil demonstrated excellent tribological properties compared to that of commercial mineral oil.

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