arc length to define sketch
arc length to define sketch
(OP)
When I develop a sheetmetal part with multiple tangent bend radii I often need to compensate for recoil or material spring-back when forming. A basic rule we follow is when altering a rad for recoil never change the arc length or your total flat blank length will not be acurate. So my question is..
How can I use the arc length as one element to define a sketch?
In concept I would construct a sketch of my form profile with tangent relations, lock all flat lengths and arc lengths. I would simply modify the radii dimensions for recoil and the entire sketch will adjust its shape accordingly but will always maintain the overall form profile length (flat blank length). We have a custom lisp routine in autocad that does this for us. It saves a lot of time when developing complex formed parts.
Can I possibly achieve this with table driven dimensions? can I control arc lengths in a table? if so then my problem is solved
How can I use the arc length as one element to define a sketch?
In concept I would construct a sketch of my form profile with tangent relations, lock all flat lengths and arc lengths. I would simply modify the radii dimensions for recoil and the entire sketch will adjust its shape accordingly but will always maintain the overall form profile length (flat blank length). We have a custom lisp routine in autocad that does this for us. It saves a lot of time when developing complex formed parts.
Can I possibly achieve this with table driven dimensions? can I control arc lengths in a table? if so then my problem is solved
Tom Malinski
Sr Design Engineer
OKay Industries
New Britain CT






RE: arc length to define sketch
Flores
SW06 SP4.1
RE: arc length to define sketch
thanks for your reply
Tom Malinski
Sr Design Engineer
OKay Industries
New Britain CT
RE: arc length to define sketch
RE: arc length to define sketch
Tom Malinski
Sr Design Engineer
OKay Industries
New Britain CT
RE: arc length to define sketch
RE: arc length to define sketch
thanks for your input. I went back to my sketch and it would not let me dimension both. But thanks to your reply I looked a little closer and found another dimension that was causing the overdefined error. So I deleted it and now everything works as I thought it should.
Thanks so much.
Tom Malinski
Sr Design Engineer
OKay Industries
New Britain CT
RE: arc length to define sketch