The sequence of operation are as follows: 1. Activate the lever of the 4/3 DCV to start the process 2. Cylinder A and Cylinder B clamps the workpiece at the same time 3. Activate the second DCV (4/2 DCV with spring return) to drill cylinder lowers the drill and raises afterwards (use pilot operated flow control valve to control the speed of the drill low and up). 4. Once the drill is raised completely, operate the lever to retract cylinder A and cylinder B. Note: provide the following clearly List of the components required 2. Hydraulic circuit with description to each component 3. state diagram should present the sequence of operation Cylinder A 4 Drill-Low Part/Material Figure 1: Drilling Process a) Design the Hydraulic Circuit with proper labeling. Include the components required ) Draw the Displacement -step diagram & Displacement -time diagram for the position of DCV cylinders A, B and drill

The sequence of operation are as follows: 1. Activate the lever of the 4/3 DCV to start the process 2. Cylinder A and Cylinder B clamps the workpiece at the same time 3. Activate the second DCV (4/2 DCV with spring return) to drill cylinder lowers the drill and raises afterwards (use pilot operated flow control valve to control the speed of the drill low and up). 4. Once the drill is raised completely, operate the lever to retract cylinder A and cylinder B. Note: provide the following clearly List of the components required 2. Hydraulic circuit with description to each component 3. state diagram should present the sequence of operation Cylinder A 4 Drill-Low Part/Material Figure 1: Drilling Process a) Design the Hydraulic Circuit with proper labeling. Include the components required ) Draw the Displacement -step diagram & Displacement -time diagram for the position of DCV cylinders A, B and drill

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter8: Computer Numerical Control

Section8.1: Cnc Basics

Problem 3RQ: Briefly describe a ball screw and a linear guide.

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HYDRAULICS & ELECTRO-HYDRAULICS

In the drilling process shown in Figure 1, there are three cylinders in which cylinders A and B are used to clamp the work piece and Drill cylinder is used to lower and raise the drill.
The sequence of operation are as follows:
1. Activate the lever of the 4/3 DCV to start the process
2. Cylinder A and Cylinder B clamps the workpiece at the same time
3. Activate the second DCV (4/2 DCV with spring return) to drill cylinder lowers the drill and raises afterwards (use pilot operated flow control valve to control the speed of the drill low and up).
4. Once the drill is raised completely, operate the lever to retract cylinder A and cylinder B
Note: provide the following clearly
1. List of the components required
2. Hydraulic circuit with description to each component
3. state diagram should present the sequence of operation
Cylinder A
Drill
Drill-high
Drill-Low
sensors
Part/Material
Cylinder B
B
Figure 1: Drilling Process
a) Design the Hydraulic Circuit with proper labeling. Include the components required
b) Draw the Displacement -step diagram & Displacement-time diagram for the position of DCV cylinders A, B and drill

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