Development of an Integrated Approach to the Design of Reconfigurable Micro/Mesoscale CNC Machine Tools

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
Roberto Pérez ◽  
Arturo Molina ◽  
Miguel Ramírez-Cadena
Keyword(s):  
Machine Tools ◽  
High Speed ◽  
Manufacturing System ◽  
System Development ◽  
Integrated Approach ◽  
Open Architecture ◽  
Cnc Machine Tools ◽  
Test Bed ◽  
Cnc Machine ◽  
Development Context

In the present, the technology related to the micro/meso manufacturing is promising as a key enabling technology for maximizing high value manufacturing. This paper addresses a new methodology to design reconfigurable micro/mesoscale CNC machine tools in the integrated product, process, and manufacturing system development context. This is followed by a description of the design of a reconfigurable two-axis first-generation test bed CNC micromachine tool that was developed to assess the feasibility of the new design method. The test bed utilizes a high-speed miniature spindle that is required to obtain appropriate cutting velocities for the efficient cutting of metals, use micro-actuators for the axis movements and open-architecture controllers, in order to guarantee the reconfigurability properties of the micromachine. Results indicate the new methodology enhances the design of reconfigurable micro/mesoscale CNC machine tools in the integrated product, process, and manufacturing system development context, following the prescriptive models of design.

A unified manufacturing resource model for representation of computerized numerically controlled machine tools

2009 ◽  
Vol 223 (5) ◽  
pp. 463-483 ◽  
Author(s):  
P Vichare ◽  
A Nassehi ◽  
S Newman
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Manufacturing System ◽  
Cutting Tools ◽  
Cnc Machining ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Resource Model ◽  
Machining System ◽  
Manufacturing Resource

The capability of any manufacturing system primarily depends on its available machine tools. Thus machine tool representation is a vital part of modelling any manufacturing system. With the rapid advances in computerized numerically controlled (CNC) machines, machine tool representation has become a more challenging task than ever before. Today's CNC machine tools are more than just automated manufacturing machines, as they can be considered multi-purpose, multi-tasking, and hybrid machining centres. This paper presents a versatile methodology for representing such state-of-the-art CNC machining system resources. A machine tool model is a conceptual representation of the real machine tool and provides a logical framework for representing its functionality in the manufacturing system. There are several commercial modelling tools available in the market for modelling machine tools. However, there is no common methodology among them to represent the wide diversity of machine tool configurations. These modelling tools are either machine vendor specific or limited in their scope to represent machine tool capability. In addition, the current information models of STEP-NC, namely ISO 14649, can only describe machining operations, technologies, cutting tools, and product geometries. However, they do not support the representation of machine tools. The proposed unified manufacturing resource model (UMRM) has a data model which can fill this gap by providing machine specific data in the form of an EXPRESS schema and act as a complementary part to the STEP-NC standard to represent various machine tools in a standardized form. UMRM is flexible enough to represent any type of CNC machining centre. This machine tool representation can be utilized to represent machine tool functionality and consequential process capabilities for allocating resources for process planning and machining.

scholarly journals An approach of developing low cost ARM based CNC systems by controlling CAN drives

2018 ◽  
Vol 224 ◽  
pp. 01020 ◽  
Author(s):  
Georgi M. Martinov ◽  
Akram Al Khoury ◽  
Ahed Issa
Keyword(s):  
Machine Tools ◽  
High Speed ◽  
Low Cost ◽  
Cnc Machine Tools ◽  
Application Layer ◽  
Cnc Machine ◽  
Servo Drive ◽  
Wide Range ◽  
Quality Of Products

Nowadays, there is a big demand on using small sized CNC machine tools, which have low price tag, wide range of implementations, low manufacturing costs and can be used for educational purposes. These machines can achieve casual manufacturing routines, like milling and drilling in applications, where there is no need for high speed performances and super quality of products. In this work, we proposed a model of CNC for these machines and analysed its components and efficiency. The model consists of three main layers: CNC system (application layer), ARM based microcomputer as CAN master and controller (connecting layer) and Servo-Drive Step Motors (actuating layer).

Non-Contact Device for Measuring Frequency Response Functions of CNC Machine Tools

Manufacturing ◽  
2003 ◽  
Author(s):  
Donald Esterling ◽  
F. Donald Caulfield ◽  
Aaron Kiefer ◽  
Gregory Buckner ◽  
Pavan Jaju
Keyword(s):  
Frequency Response ◽  
Machine Tools ◽  
High Speed ◽  
Operating Conditions ◽  
Modal Testing ◽  
Cnc Machine Tools ◽  
Cnc Milling ◽  
Cnc Machine ◽  
Machining Processes ◽  
Test Procedures

The frequency response function (FRF) of a CNC machine tool is composed of tool/toolholder/spindle dynamics, and plays an important role in determining the stability of high speed machining processes. This paper details the design, development and operational verification of a non-contacting, controllable, electromechanical actuator (EMA) for measuring the FRFs of tools mounted in CNC milling machines. Although standard modal testing methods are available and provide similarly accurate results, these test procedures are difficult to perform in machine shop environments and can require expensive equipment. The EMA developed as part of this research extends the capabilities of the NIST “best speeds device” to provide controllable, non-contacting excitation for modal tests on machine tools. This EMA device offers the advantages of being accurate, easy to use, and applicable to a wide variety of tools and operating conditions.

Study on an Acc/Dec Method Based on Moving Average Technology for CNC Machine Tools

2014 ◽  
Vol 556-562 ◽  
pp. 1413-1416 ◽  
Author(s):  
Tian Xiang Hu ◽  
Li Bing Zhang ◽  
Ting Wu ◽  
Feng Li Huang
Keyword(s):  
Machine Tools ◽  
High Speed ◽  
Processing Time ◽  
Moving Average ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Cnc System ◽  
Planning Approach ◽  
Velocity Planning ◽  
S Curve

To overcome some shortcomings of the linear Acc/Dec approach and the traditional S-curve Acc/Dec method, a novel velocity planning approach is proposed for CNC machine tools in this paper. The velocity planning model based on moving average technology is structured. The presented approach is used to make velocity planning for the CNC system. Comparing with the linear Acc/Dec algorithm, the presented method greatly improves motional smoothness of the linear Acc/Dec approach and reduces the complexity of the traditional S-curve Acc/Dec algorithm, which is more suitable for high-speed and high-precision CNC machine tools. The proposed approach is tested by simulation and experimentation. Simulation and experimental results have shown that the proposed method can significantly improve the motional smoothness and consumes less resource and shortens processing time for the CNC system.

scholarly journals EXPERIMENTAL ANALYSIS OF THE INFLUENCE OF BALLSCREW STIFFNESS ON THE POSITIONING PRECISION OF KINEMATIC FEED CHAINS USED ON CNC MACHINE TOOLS

2017 ◽  
Vol 20 (2) ◽  
Author(s):  
MARIAN FUNARU ◽  
GHEORGHE STAN
Keyword(s):  
Machine Tools ◽  
Experimental Tests ◽  
Chain Structure ◽  
Measuring System ◽  
Cnc Machine Tools ◽  
Test Bed ◽  
Cnc Machine ◽  
Positioning Precision ◽  
Mechanical Part ◽  
Chain Stiffness

Recent trends in the machine tools domain have focused on improving the manufacturing performances by increasing the feed rates and acceleration values. In this context, the stiffness of the constructive elements which form the mechanical part of the kinematic feed chains need to be studied in order to determine the machine tool dynamic behavior. This study plays a very important role in the correct dimensioning of the feed chain structure and in establishing an optimum control law for the closed-loop system. The present paper presents an experimental study which demonstrates the influence of the whole kinematic feed chain stiffness on the positioning precision of the moving table. Experimental tests were carried out on a test bed which uses the indirect position measuring system, in which case all the external disturbances affecting the mechanical part are found in the values of the positioning precision parameters.

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