The production method of stainless steel shrimp waist elbow

There are many ways to make stainless steel shrimp waist elbow, one of them:

1. Define the bending radius.

2. To make an Angle ABC is equal to 22.5 degrees (let's assume the tip is to the left), and the two lines BA and BC each have longer than the bending radius.

3. Point B is the center of the circle, and the bending radius is the radius of the arc and the BA is in D

4. With point D as the center, the outer diameter of the pipe is the circle of radius, and there are two points on the left, and the right is point 2.

5. Starting from point 1, the circumference of the circumference of the circle is 12 equal points, and the points are marked, clockwise order point 1, 3, 3, 4, 5, 6, 7, 9

6. Turn the connecting point 12 and 3 into BA at 13, and extend the BC to b; Point 11 and point 4 cross BA at 14 and extend BC to c; The points 10 and 5 are given to BA at 15 and extend the BC to d; Point 9 and 6 cross BA at 16 and extend BC to e; Point 8 and 7 cross BA at 17 and extend BC to f.

7. Cross the vertical line of BA in a. Cross point two is the vertical cross of BA is BC in g.

8. The line segment 1a, 13b, 14c, 15d, 16e, 17f and 2g are the lines we need. In turn, we call it 1, 2, 3, 4, 5, 6 and 7.

9. Draw a straight line that is equal to the circumference of the outer diameter of the pipe, and divide it into 12 equal parts, and mark the points, including 13 points at both ends.

10, line 1, 2, 3, 4, 5, 6 and 7, and copy them to each point.

Positioning method is:

One, from left to right, is 4, 5, 6, 7, 6, 5, 4, 3, 2, 1, 2, 3, 4.

The vertical circumference of each line is vertical.

3. The points 15, 16, 17, 2, 17, 16, 15, 14, 13, 13, 13, 14 and 15 of the corresponding segment are to be on the perimeter.

11. Smooth join point defgfedcbabcd. Form a round curve.

12. The shape of the curve and the four lines and the line of the circumference is the pattern of the two bars we want.

13. In the plane, the pattern of the two sections of the curve is reflected by the symmetrical boundary line in the plane. The whole figure obtained is the middle section.