CNC 2 Essay Example

Introduction:

The Computer-Aided Design (CAD) entails the creation of models using computer via geometrical parameters. The CAD models appear on the monitor of a computer typically as a 3-D representation or system of a part. It can be easily altered via change of the parameters relevant to it. Therefore, the CAD system allows the designers to see an object under a various representations, which are broad. It also gives tests to these objects through the simulation of conditions in the real world. On the Computer-Aided Manufacturing CAM0, data from geometrical design is used in the control of the automation machines. The system is associated with the control of the computer numerical (CNC) on in the system of the Direct Numerical Control (DNC).

From the current CAM system, results show a difference in it to the older numerical control. The differences are based on the geometrical data, which is mechanically encoded. Therefore, both CAM and CAD use methods that are based on computer methods to encode geometrical data. As a result, integration of the designs and manufactures processed can easily occur. In the works, programming of the milling machine using the CAD/CAM machine is discussed. CAM/CAD milling software can be used in the delivery of the required functionality in the milling process. It uses an axis of 2.5 that is simple up to 45-axis simulation.in quickening the programme; the CAM/CAD uses interfaces, which are driven by simple wizards for their functionality.

Task 1A) Calculate the speeds and feeds for a 10mm four-flute short end mill

Number of flutes = 4

Diameter =10mm

Feed per teeth (IPT) = 20

Number of teeth – 4 therefore, cutting feed = IPT* 4 = 40.000 (IPR)

Cutting speed (SFM) =23 * 12

Tool diameter= 10.000 *22/7 therefore, spindle speed (RPM) =SFM * TOTAL DIAMETER.

Therefore, the feed rate (IPM) = IPR * RPM

= 40.000 / 9 = 351. 414

CUT TIME = cut length / IPM = 10/ 351.414 = 0.028.

Task 1B. Using correct tool path strategy, apply planar machining to achieve a good surface finish

On the Ramping Mini-Calc is where we begin our work. In the screen shots below, we have set ups, which are aggressive, which are used in the scenarios of machining using the CAM/CAD. The setup is using aluminium of 6061 diameter. Besides, we have chosen a TiAIN, which is a 1/2″ 3-flute End mill. These flutes are serrated thus being rough to boot and are said to be corncobs. The CAM/CAD set up programme is meant for the cutting of pockets as well as several features in some parts of the diagram and vehicles too. Therefore, it is through the ramp that many have opted for the swimming. The usage of the ram INS shown to the till how to use the Ramp Mini-Calc is shown in the essay for the search to solve a couple of interesting problems.

The schedule is that we use plan to ramp down at some «standard» rate, say a 3 degree angle. Solution to the strategy as well as several adjustments are to be made on the speed as well as in the feeding of the firms. Therefore, it is harder and misunderstood better than making a level cut. Let us say we are to reduce the labour pocket at a 1/2″ depth. Since there is a devotion and depreciation of the Lothe ramp this result to the ramp in one, pass. +I will use a 1/2″ depth of cut at full ramp. Here is the Ramp Mini-Calc with all that entered in the data sheet.

Figure 1.1

This is a sketch of how the drawing starts. It all begins from sketching the background diagram and it layout.

Figure 1.2

The figure above shows a 3D layout of the diagram to be manufactured.

Figure 1.3

In the diagram above and the one that follows shows the side view and the front view of the 3D diagram of the diagram to be manufactured using the CAD/CAM. We have both CAM and CAD using methods that are majorly based on computer methods to encode geometrical data. As a result, integration of the designs and manufactures processed can easily occur. In the works, programming of the milling machine using the CAD/CAM machine is discussed. CAM/CAD milling software can be used in the delivery of the required functionality in the milling process. It uses an axis of 2.5 that is simple up to 45-axis simulation.in quickening the programme; the CAM/CAD uses interfaces, which are driven by simple wizards for their functionality.

Figure 1.4

Figure 1.5

Figure 1.6

On the diagram above, it shows how to select a Tool from the tool crib in the system. One has to first select the crib with the crib menu and then the Tool Selectors will be updated to showing only the tools within that particular Tool Crib.

It’s important .to master that in the selection of the Tool Crib, the Shape and size of the tools has its Options being greyed out. Changing the sizes and shapes has to be done through the tool cribs.

Figure 1.7

Figure 1.8

Figure 1.9

The diagram above shows the Cut Specifications. Therefore, we have a fully specified what sort of cutter you are using, and it is time to specify the cut. Parameters relating to the cut appear on the next row down:

Entergy of the cut depth and the cut width.

— Cut Width and Cut Depth are also expressed as a percentage of tool diameter: Axial Engagement is lengthwise along the cutter. Radial Engagement is whole diameter or slot width.

Optimizer

When choosing the least limiting Cut Width and Cut Depth, one need to join a party somewhere. Several machinists are developed through commands of the rules set for them to adhere to. How the tools have serviced in the past too matters with the G-Wizard introducing the Cut Optimizer. This gives aid in the calculation of more optimal widths and depths of cut which are based on the deflection of the tools analysis. It’s possibilities of getting higher scientific information about your choice of width and depth of cut is guaranteed. Therefore, better choosing of widths is recorded (Schievink, 2015 pp. 12-15)

Figure 1.10

Figure 1.11

Figure .1.12

Figure 1.13

Figure .1.14

After pressing the advanced button, you can read off a number of additional parameters about your cut as shown in the screen shot. Any of the indicators that have that little padlock to the right are ones you have overridden from the recommended settings. Be sure to look at G-Wizard’s recommendations before you try to override anything! To make the Advanced Cutting Parameters go away, just press the «Simplify» button, which is in the same place the «Advanced» button was before.

Figure 1.15

Feeds and Speeds

The speed and feeds deal with the G-Wizard. The wizard can be used in the calculation of the feeds and speeds. The calculations are done through informing the drawer on the feed rate as well as the RPM to be used in the process. In the advanced parameters in cutting, we have a wide range of data which is necessary in making one to understand the activities being partaken then. Besides, the results are potential fine tunes. Also, additional data is collected after one presses on the “Advanced» key. Most of the time, the additional stuff is preserved thus preventing it from getting distractions (Schievink, 2015 pp. 12-15).

It is important to note that when one is hitting the machines limits most times records a change in the color of the RPM or the Feed rate. Pressing on the Advanced button gives the behind the change in color of the advanced parameters.

FIGURE 1.16

.Figure 1.17We have the Gas Pedal being in the list of the calibrated tools from Conservative too Aggressive in multiple steps. The conservative end emphasizes Tool Life and Surface Finish. It lowers the feed rate to just a little above where the rubbing warning would be given in the Tips area to the left of the Gas Pedal. If you go much slower, you start risking rubbing, which can shorten tool life. In the Full Tortoise conservative position, not only is feed rate limited, but the deflection allowance is reduced to be that of a finish cut. The aggressive end emphasizes Material Removal Rates. The Gas Pedal always comes up in the far right «Full Hare» roughing position (Schievink, 2015 pp. 12-15)

The beginner are required to crank the Gas Pedal over towards the side, which is more. It will help in the adoption of the fuel and speed used me the manufacturing. Besides, it is necessary for one to ensure conformability in their work. (Schievink, 2015 pp. 12-15)

For the experienced people, use of the Gas Pedal is necessary. It is a way of putting more to emphasis on the divergences between finishing and roughing. Besides, it may be a way of offering a safety margin to the job. For clarification, an example shows that if one is at the last cutter of a given size and the job has to be finished in the same day, one needs to be conservative to maximum. For the emphasis of finer finish of the surfaces, being conservative also helps greatly. When handling a job whose period for completion is 2-3 days one is required to be more careful on the conservations.

Figure 1.20

Figure 1.20

Figure 1.21

Cutting Parameters Column

The figure above is dealing with the cutting parameters as well:

Surface Speed (SFM or SMM in Metric): shows how fast the tool can move relative to the cut of the material needed. SFM is «Surface Feet per Minute» and «SMM is Surface Meters are denoted and measured per Minute». SFM greatly determines the life of the tools. The wearing of the tools is brought about through exceeding of recommended SFM while when one running slower than recommended SFM, may result into extend the tool life (Lieberman, 2007)

IPT: Inches Per Tooth, can also be termed as Chip load and is used in the metric. Its units are mm per tooth. To increase the life of the tool to maximum, one needs to make the cuts almost to the required chip load. This should be done in avoidance of going beyond the recommended part. Besides, when one exceeds the chip load, the tools break. Excessive SFM leads to wearing or burning of the tool, with excessive chip load breaking them.

IPR: it stands for: Inches per revolution, or mm per revolution for metric.

During thinning of the chips and AFPT, the screens of the mill cutter are at a machine of high speed. Besides, the speed doesn’t greatly affect the operation of the machining. If we have from ½ and below diameter of the radial engagements, we end up not slicing the chips to the required thickness. Therefore, the chips get «thinned». The ideology behind these settings is to set up the feed rate to a position of slicing full thickness chips over and over again. The checkbox named “Chip Thinning» is used for turning off and on the machine. Slicing of thin chips leads to premature wearing of the cutter or slicer. Therefore, one has to attempt to reach the recommended chip loads through heating of the bumping. Also, AFPT as well as chip thinning results to generation of great lead angles (Lieberman, 2007)

Figure 1.22

Figure 1.23

In conclusion, we find out that from the current CAM system, results show a difference in it to the older numerical control. The differences are based on the geometrical data, which is mechanically encoded. Therefore, both CAM and CAD use methods that are based on computer methods to encode geometrical data. As a result, integration of the designs and manufactures processed can easily occur. In the works, programming of the milling machine using the CAD/CAM machine is discussed. CAM/CAD milling software can be used in the delivery of the required functionality in the milling process. It uses an axis of 2.5 that is simple up to 45 axis simulation.in quickening the programme, the CAM/CAD uses interfaces which are driven by simple wizards for their functionality.

The Computer-Aided Design (CAD) entails the creation of models using computer via geometrical parameters. The CAD models appear on the monitor of a computer typically as a 3-D representation or system of a part. It can be easily altered via change of the parameters relevant to it. Therefore, the CAD system allows the designers to see an object under a various representations, which are broad. It also gives tests to these objects through the simulation of conditions in the real world. On the Computer-Aided Manufacturing CAM0, data from geometrical design can be used in the control of the automation machines. The system is associated with the control of the computer numerical (CNC) on in the system of the Direct Numerical Control (DNC) (Durrieu, 2010, pp.923-S2).

For the experienced people, use of the Gas Pedal is necessary. It is a way of putting more to emphasis on the divergences between finishing and roughing. Besides, it may be a way of offering a safety margin to the job. For clarification, an example shows that if one is at the last cutter of a given size and the job has to be finished in the same day, one needs to be conservative to maximum. For the emphasis of finer finish of the surfaces, being conservative also helps greatly. When handling a job whose period for completion is 2-3 days one is required to be more careful on the conservations.

References.

Durrieu, F., Samejima, K., Fortune, J.M., Kandels-Lewis, S., Osheroff, N. and Earnshaw, W.C., 2010. DNA topoisomerase IIα interacts with CAD nuclease and is involved in chromatin condensation during apoptotic execution. Current Biology, 10(15), pp.923-S2.

Lieberman, H. ed., 2007. Your wish is my command: Programming by example. Morgan Kaufmann.

Schievink, W. and Roiter, V., 2005. Epidemiology of cervical artery dissection. In Handbook on Cerebral Artery Dissection (Vol. 20, pp. 12-15). Karger Publishers.