Objective
Moulds for glass and plastic bottles are often non-circular and are manufactured using hydraulic copying lathes. Due to insufficient dynamic behaviour of the hydraulic drive and the necessity to manufacture a complex master workpiece, the turning on hydraulic copying lathes is the major source of form deviations and the bottleneck of production. The goal of BOTTLE-NC2 project is the development of a new type of CNC-lathe with highly dynamic direct drives for infeed-motion and spindle position.
A machine concept for an efficient production of noncircular glass moulds was presented. The production process is mainly limited by the dynamic behaviour of the feed drive system. A prototype of a highly dynamic feed drive system was developed based on the latest technology in linear motor drives. To avoid excitation an active mass compensation for the feed drive system was developed.
The main spindle has a great impact on the capabilities of the new machine tool. The required velocity and acceleration rates of feed drive depend upon the complexity of the bottle shape and the rotational speed of the workpiece. The prototype of the main spindle is based on a water cooled built-in direct drive. To generate minimum flutter of the rotational speed at low number of revolutions the main spindle is fitted with an angular measurement system that provides a high resolution.
To design a computer aided design/numerical control (CAD/NC) coupling for the production process of noncircular glass moulds a new CAD/NC postprocessor was developed. It generates NC turning programs for noncircular workpieces directly from the CAD system. For optimal adaptation of the processed NC program to the capabilities of the machine, a user interface is implemented in the postprocessor to simplify the input of the technology data.
As machine control a Siemens 840D computer numerical control (CNC) was tested. To adapt the synchronous linear motors of the developed feed drive system to the digital servo amplifiers several modifications had to be made. Linear servo motors can then be controlled by Siemens CNC without any restrictions. Therefore a closed loop control structure for the machine has been achieved.
The results of the project can be exploited in a wide range of application fields, such as the design of machine tools for high speed cutting.
Modern control strategies will be employed for the compensation of lag errors. A CAD-programming system will be enable the efficient definition of the bottle shape as well as the automatic generation of numeric control data by a postprocessor. The turning speed will be adjusted continuously taking into account technological limitations resulting from the cutting process as well as the drive capacities. With the new lathe a reduction of manufacturing time of 70 % will be realized. Furthermore, the efficiency and flexibility of production is increased by the CAM-approach.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- social sciences political sciences political transitions revolutions
- engineering and technology materials engineering
You need to log in or register to use this function
We are sorry... an unexpected error occurred during execution.
You need to be authenticated. Your session might have expired.
Thank you for your feedback. You will soon receive an email to confirm the submission. If you have selected to be notified about the reporting status, you will also be contacted when the reporting status will change.
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Data not available
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Data not available
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Data not available
Coordinator
4952 PORTA
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.