Create parametric 3d solid model of the piston block

Assignment Help Mechanical Engineering

Reference no: EM132343020

Aims:

1. To develop comprehensive knowledge in application of concurrent engineering concepts using integrated CAD/CAM/CAE software tools in modern design and manufacture.

2. To develop confidence and capability in the effective use of industrial standard CAD CAM CAE systems.

Learning outcomes

1. Critically evaluate current CAD/CAM/CAE technologies and their application to enhance engineering design and manufacture.

2. Apply and critically evaluate the modern CAD techniques, practices and limitations of 3D solid modelling for efficient engineering design.

3. Apply numerical analysis and simulation tools within a CAD system, in order to predict product behaviour and optimise performance, and critically evaluate their limitations.

4. Employ and critically evaluate a range of CAM approaches and CNC simulations in order to plan manufacturing processes, optimise manufacturing time/ cost, and produce NC data for efficient production.

Tasks to be carried out:

1. Create parametric 3D solid model of the piston block shown in Fig.1 for internal combustion engine. The internal diameter (piston diameter-d mm) should be according to Table 1. Your design should be as close as possible to the original design shown in the picture. Assign material and calculate volume (cm³) and mass (kg).

2. Develop a set of relations between feature parameters that will set the height to be 1.4 times the internal diameter and enabling successful parametric modifications. Create a family table with 3 instances. Show the relations and the modification process in the report.

3. Apply numerical strength analysis (Creo Structure) to the piston block model simulating the combustion (25 bar pressure). Minimise piston mass while keeping the critical strength within material limits.

4. Import the provided 3d part model to Creo and use it as reference part for the CAM model. Create a square block as workpiece having sufficient allowance to machine the top part of the model (no need to machine the bottom and the sidewalls of the square base).

5. Create a process plan and set up a manufacturing process using a 3-axis CNC milling machine to machine the part in mild steel. Select appropriate machining sequences including finishing where needed. Configure the relevant cutting tools for them. Create and observe the tool path cutting simulation of each sequence.

6. Select/calculate appropriate cutting parameters and use the CADCAM system to estimate the machining time for each sequence and operation.

7. Report - present all your work with relevant comments, screen captures, and discuss the main 3D CAD CAM principles. (max 2000+-500 words).

Attachment:- CADCAM Systems.rar

Reference no: EM132343020

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Reviews

len2343020

7/21/2019 9:48:50 PM

60-70% Submission shows a very good understanding of the learning outcomes. As above and also developing a reiterative approach to improve the part design using FEA strength analysis, CAM and machining time optimisation and also a good understanding of the main 3D Cad principles and modelling techniques. 70% + Submission shows a thorough understanding of the learning outcomes as applied to the problem area. A thoroughly professional report demonstrating excellent 3D CAD design and CAM solutions, application of FEA strength and machining time (CAM) optimisations, robust 3d solid models applying parametric modelling principles and relations, including discussion on CADCAM systems advantages/disadvantages and identifying the key features and functionality.

len2343020

7/21/2019 9:48:40 PM

Assessment grades for this course work will be based upon your Creo files/models and submitted report. To qualify for each grade, the minimum expectation is listed. 50-60% Submission shows a reasonable understanding of the learning outcomes. A reasonably good 3d solid part with parametric relations, single-pass FEA strength simulation, CAM models and simulations were developed demonstrating reasonable understanding of the main CAD CAM applications. Brief description of the required tasks illustrated with screen dumps and discussion on CADCAM systems advantages and disadvantages have been presented in a report.

len2343020

7/21/2019 9:48:36 PM

Submit your files to Moodle Second attempt drop box before the date and time specified at the title page as follows: 1. Zipp file - all Creo models from the working directory (3d CAD and CAM models) zipped into a single file. (100Mb maximum size) 2. Report file (PDF or Word) Notes: Check that the zipped file contains ALL necessary files. Before zipping the files, make sure that they can be opened with PTC Creo. Do not submit the files from the FEA Structure Analysis directory. For point 3 submit your *.PRT model with the analysis description together with screen shots of the results and corresponding discussion in the Report file.

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