Hi. I have a plain square plate of unknown exact size and I want to ensure that 4 holes on a 100x100 square pattern are positioned centrally and oriented correctly. How is this dimensioned/toleranced?
I've seen many drawings where plate centrelines will be marked and =100= dimensions are put...
I'm modifying an existing framework to be lifted by a forklift. The framework weighs 2000kg and is 4m x 4m footprint by 2m height, so it's quite a wide load. Centre of mass is central and is 0.7m height.
We'll be using a large forklift (versalift) with ample capacity and fork length to lift...
Hi. I need to project the 'shadow' of an object from a point source of light onto a flat surface. This object is a cone, but could be more complex.
Any thoughts on how this might be achieved?
Hobbs101
Mechanical Design Engineer
Hi. I've got an M40x1 threaded hole in a 12mm plate of aluminium alloy (6082-T6). An threaded adjuster bar sits in the hole. What's the best material to make the bar out of to prevent galling? I'm thinking brass, bronze or aluminium bronze. I am also able to use lubricant e.g. grease.
Hobbs101...
Hi. I'm intending to get a welded aluminium assembly bead blasted to remove blemishes and give a satin finish.
I understand glass beads are best for aluminium. I'm looking for a 'fine smooth finish'. Can anyone recommend a typical bead size to achieve this? Or, I can specify a surface roughness...
Hi. If I have a plate and with a hole through the plate, I put on the drawing 'M6 THRU'. That's clear.
But, if I have a box section and I want the hole to just go through the wall of the box section, what is the standard notation? I've previously stated 'M6 THRU SECTION WALL', but that sounds a...
Hi. I've not been using iparts for long and am realising that they might be more trouble than they are worth!
So, I've got a family of shafts, 4 off, identical other than lengths. I've converted the part to an ipart and set the lengths accordingly. I've put the iparts into my assembly. All is...
Hi. I've got a powerscrew that is applying a compressive force of 25kN. The torque applied by the actuator to the nut to move the powerscrew is 200Nm. The shaft has a slenderness ratio of 124.
I've calculated using the Euler formula that I have a good x10 safety factor on buckling, but this...
Hi All
I'm a freelance engineer working on small design projects (typically <100 designed parts). Projects are generally industrial machines that sell in small numbers. With each sale of a machine, design improvements are made.
I'm looking to devise a simple revision control system. I use...
Hi
I'm designing a mechanism that has a lead block. Block is 230 x 100 x 100mm. It is made from lead with 4% antimony. Weighs about 30kg. The block is used to shield x-rays.
I need to support the block off one of it's 100 x 100 ends. The other end is unsupported. The block will be used in...
Hi. I'm developing concepts for a mechanism that I need to design. The requirements are
- move a metal block (4"x4"x8") along a circular path
- stroke angle = 11.5deg
- radius of circular path = 0.5m
- needs to be accurately positioned at any intermediate or end angle
- manual adjustment, i.e...
Hi. I'm trying to find a book that covers design ideas for welded structures. I'm tending to design more and more fabrications and sometimes I struggle to think of the best way to design a joint, interface, frame etc.
Ideally a book with plenty of illustrations/pictures.
Anyone know of such a...
Hi. A long time ago I was told that the correct way to define ABC datums is as the attached drawing. This ensures that the 3 datums are perpendicular to each other. Is this correct? When I look through GD&T books I don't ever see datums defined like...
I think I'm not understanding something fundamental about basic dimensions. See attached drawing.
I've put in basic dimensions for the holes. I'm happy with that.
I've used basic dimns for the slots. I realise that this probably isn't correct, but I'm treating the slots as 2 holes that are...
Hi. I have a port on a pressure vessel (14 bar). The port is 2" diameter hole. A flange plate bolts over the port. The fasteners are on a 5" PCD. I need an o-ring to seal the port. Should I select an o-ring size that is close to the port size, i.e. just over 2". Or, should I select an o-ring...
I'm designing a machine enclosure from 1.2mm thick steel sheet. The overall size is approximately 400mm cubed. I need a square cutout in one face, but it needs to be 5.7mm from the folded edges. Is this going to be a problem when folding these edges? If so, is it an option to cut the aperture...
Hi. What are the limitations in welding different grades of carbon steel? For instance, can I weld grades 1045 and 4140 together?
If I use SMAW, can I just specify electrode E60 and not worry about the grades of steel that I'm welding?
Thanks
Hi. I have a large iron casting, 1.8m long, 1.0 diameter, 800kg. It has an internal bore. It has many external and internal features. It is due to be delivered to us painted in dewatering oil to prevent rusting during transit, specifically Castrol Rustilo DWX32. I need to be able to clean off...
Hi, anyone know how to exclude parts/assemblies from being sectioned in the 3D viewport? I've seen it done in Solidworks but can't see how it might be done in Inventor 2014.
Also, in Inventor, I've read that when you're in part priority mode and you select a part, the assembly that the part...
Hi. I have a part that's been imported from a step file. See attachment for part tree.
I want to add a new feature to this part by extruding some holes through it. I've drawn the sketch but Inventor won't allow me to extrude. Why is this? How do I get around this problem?
Thanks in advance...
