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Proper Method to Produce Lobster-back Duct Bends

lawrie
in Drafting
3 1 Beginner
One type of industrial component I have been involved with the design and manufacture of is lobster-back bends. This type of duct bend is made up of segments cut from flat sheets or plates, rolled into cylindrical parts, then assembled. These can be light sheet-metal or manufactured from thick plate. This quick tutorial is a supplement to the one I produced an outline of a method I have used modeling this type of component using Alibre Design. As this supplement concerns producing parts ready for manufacture and applies to whatever software you have used, that is not important as this short tutorial is to outline turning your modeled bend into the flat profile ready to be made into the completed bend. In this modern world, the bend parts will be cut out using CNC laser, or CNC Plasma cutting machines. Sometimes we produce the nc programs ourselves or we are required to produce the correct files for the laser / plasma department to program and cut out. Making the program to cut out the parts starts normally from a 2D dxf file at a scale of 1 : 1. This is the first part of the process that has to be correct. If you produce this dxf incorrectly the finished parts will be useless. Producing this at the right scale, 1 : 1 is different with different 3D cad applications, other problems can be caused by you working in different drawing units. If you are not doing the program, talk to the person who is to make sure you produce the dxf as required. Having a large quantity of wrongly cut parts is not a good thing
Alibre Design

Tutorials:-Working with Power MILL " PART I" To Generate the Programs(G-coded & M-coded) For Various CNC Machines.

Sourbh
in Design & CAD
8 1 Beginner
Let Start With Beginning..
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Tutorials:-Working with Power MILL " PART II" Machining Setup

Sourbh
in Design & CAD
3 0 Beginner
Here is the Next Part of Working with Power Mill.. Follow the Steps and You will found your way with Power Mill. Some text are Referenced from Book and Online Training Tutorials Thanks and Enjoy..!!
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Tutorials:-Working with Power MILL "PART III" 3D Area Clearance.

Sourbh
in Design & CAD
2 0 Beginner
next here
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Tutorials:-Working with Power MILL " PART I" To Generate the Programs(G-coded & M-coded) For Various CNC Machines.

Sourbh
in Design & CAD
2 0 Beginner
After Step 12 here the Remain Things you Have to do...:-
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Lobsterback Duct Bends Sheetmetal Method

lawrie
in Modeling
1 0 Beginner
This is the method I use to construct lobster back bends with sheet metal tools that I can produce flat patterns from, These flat patterns can then be used to produce files for CNC profile cutting machines. I have come across other ways of doing this using surfaces, thickened and turned into sheet metal parts. The software I am using is Alibre Design. As the version I have is low on surfacing tools I have found this a good way to model lobster back bends, which I have been involved with the design and manufacture for many years.
Alibre Design

Tutorials:-Working with Power MILL "PART V" Toolpath Leads and Links

Sourbh
in Design & CAD
1 0 Intermediate
Z Heights Skim and Plunge distance provide variable control of rapid move heights within a component. These operate in conjunction with Safe Z and Start Z to minimize slow and unnecessary movement of the tool in fresh air while machining the component form. Skim distance – An incremental distance above the model at which rapid moves occur from the end of one tool track to the start of the next. The tool rapids across the model clearing the highest point along its route by the Skim value. Plunge distance – An incremental distance above the local component surface where a downward rapid movement of a tool changes to plunge rate.
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Tutorials:-Working with Power MILL "PART IV" Finish Machining Strategies.

Sourbh
in Design & CAD
4 0 Intermediate
Finishing strategies machine the actual component form and where applicable, follow on from the Area Clearance operation. Suitable values are required to control the accuracy and amount of excess material to be left on a component by a tool path. The parameters used for this purpose are called Thickness and Tolerance
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Tutorials:-Working with Power MILL "PART III" 3D Area Clearance.

Sourbh
in Design & CAD
0 0 Beginner
Hi Guys, Am back with new Tutorials for CAM work in power mill. In this part you will Learn the Different Strategies for Material Removal/3d Area Clearance. Thanks and Enjoy...!!
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Requested:-NC Program generation Problem- PP Error

Sourbh
in Design & CAD
0 0 Intermediate
This problem Generally occurs due to missing Duct processor Configuration, Duct Post or processor is generally used for offline program generation for specific CNC Machine. while post processor is for Direct NC program generation when the machine is connected to System.
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Tutorials:-Working with Power MILL "PART V" Toolpath Leads and Links

Sourbh
in Design & CAD
1 1 Intermediate
Links To provide for more efficient movement of the tool across the component the link moves that connect adjacent tool tracks can be defined in several different ways. Short/Long Threshold - This defines the distance limit up to which the Short - Links apply. Any move from the end of a tool track to the start of the next, which exceeds this distance is defined as a Long - Link move. For Short links the available options include Safe Z, Incremental, Skim, On Surface, Stepdown, Straight, and Circular Arc. For Long links the available options include Safe Z, Incremental, and Skim. Safe links apply only at the start and end of a toolpath the available options being Safe Z, Incremental, and Skim. For applications where a machine control system will permit arc fitting of rapid moves the Arc Fit Rapid Moves box can be ticked along with a suitable Radius based on the active tool diameter TDU (Of particular benefit to High Speed Machining). •Activate the toolpath 1_1 created earlier in the Leads section. •Set the Leads In and Out to None, if not already set. Press Apply.
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How to add callouts/balloons to drawing in Alibre??

ALI ALDUBAISI
in Design & CAD
0 0 Beginner
Source: Alibre Design User Guide, page 440 https://www.alibre.com/assets/user-guide-12.pdf
Alibre Design drawings callouts ballons

how to reduce time involve in plunge in power mill

Sourbh
in Design & CAD
0 0 Beginner
There it is, but I need the solid model to Tell you detail process of Reducing the plunge milling.
Powermill

Tutorials:-Working with Power MILL "PART IV" Finish Machining Strategies.

Sourbh
in Design & CAD
2 0 Intermediate
Raster, Radial, Spiral, and Pattern Finishing. Introduction. This section will cover Finishing strategies created by the downward projection of a Pattern, which include four types, Raster, Radial, Spiral and (user defined) Pattern. PowerMILL generates the toolpaths by projecting a wireframe form down the Z-axis onto the model. The standard patterns applied in Raster, Radial, and Spiral are achieved by entering values directly into the Finishing Form. The resultant Pattern can be displayed by selecting Preview before executing the command by selecting Apply. The Pattern option requires a user-defined geometric form (active Pattern), which is projected down Z onto the model as a tool path.
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Alibre Design - How to Drive a Part From a Layout Sketch

lawrie
in Modeling
0 0 Intermediate
In this tutorial I will use a 2D sketch of the layout of a fan scroll to generate a 3D sheetmetal part using Alibre Design Software. When producing a range of centifugal fans the performance of each particular fan in the range is governed by equations called the "fan laws". Once the actual performance of one fan in the range has been established the performance of all other sizes can be predicted by these laws. This makes producing a complete range of a particular type of fan an ideal task for a parametric 3D approach to produce the drawings and other details ready for manufacture. The main dimensions of our fan are based off the diameter of the rotor.
Alibre Design
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