Bernay 3D Tutorial

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Partial assembly with crosshead guide.

 

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For the insert that goes in the slot in the top of the cylinder, there is not need to create a new model, since you already have the profile you need in the cylinder block.

Just make a copy of the cylinder block, draw an outline for a cut, make sure the "cut" goes to the outside, and presto, you have your insert.

Always make use of any existing geometry you have to make a new part.
Don't reinvent the wheel if you don't have to (think smarter, not harder).

 

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Assembly with insert.

 

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Connecting rod.

 

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Connecting rod.

 

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Connecting rod assembly.

 

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Top half of eccentric strap.

 

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Top half of eccentric strap.

 

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For the bottom of the eccentric strap, don't waste time drawing an entirely new model, just make a copy of the upper strap, and then cut off the part you don't want/need.

If you recycle parts that you have already constructed, you can save a ton of time.

The strap assembly is shown in the bottom screen capture.

 

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And an assembly with the strap shown on the eccentric.

 

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Here is the model for the valve.

 

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Valve.

 

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Valve.

Some have suggested making a 3D part just as you would in real-world machining, ie: start with a large solid block, and whittle it down.

I find that method counterproductive, and instead prefer to grow the part from a series of extrusions and cuts. Whatever works for you, but that is my experience.

 

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Valve.

 

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Valve.

 

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Valve.

 

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Valve linkage.

 

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Valve linkage.

 

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Valve linkage.

 

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Valve rod.