How to feed the oval iron sealing head?
You ask is the oval head plus insulation, insulation layer outside the galvanized iron plate of the material.
Strictly speaking, it is an undevelopable object, and the method of its expansion is called approximate expansion.
Methods: 1. First draw the main attempt (1/2 ok) and top view (1/4 ok),
2. Divide a number of equal parts on the circular arc of the overhead view, and connect the equal parts with the center of the circle. (note: the portion close to the axis of symmetry is half.)
3. In the main view, parallel to the bottom edge of the head, divide a number of equal parts to the arc, and get intersection points a, b......
4. The point-by-point vertical lead from the intersection point to the top view is followed by intersection points a1, a2 on the X-axis of the top view.
5. In the top view, center o is the center of the circle, with o-a1, o-a2... Let me draw an arc of radius. At the last intersection of the bisector, a1a, a2a... .Prev News：>
Discussion on whether t weld joint is allowed on seal headNext News：>
Specification and standard for stainless steel oval head| Updated:2019.12.19 Source: Clicks:
