Making of Enchanted Dragon Leaves

Answer 1

The production of the twisted dragon blade had the following related contents:
1. ** Cutting Method **
- The pitch of a single-line spiral was equal to the lead, and the pitch of a double-line spiral was equal to 1/2 of the lead. The spiral blades were usually laid out according to the pitch or a helicoid slightly larger than the lead. After bending and forming, they were then pieced together on the shaft to form a continuous helicoid.
- The triangle method was to divide the helicoid into several triangular surfaces and treat each triangular surface as a plane to find the real shape. After that, he pieced the real shapes of these triangular shapes together in order to form the unfolding diagram of the helicoid. The specific steps were:
- Draw the top view with the inner and outer diameter d and D of the positive helicoid. Divide the inner and outer circumference of the top view into twelve equal parts, and the equal points are 0, 2, 4·12 and 1, 3, 5…13 respectively. The dots were connected by dotted lines and thin solid lines. in that main view, h is equal to the pitch and divide into 12 equal parts. the horizontal line is led by the equal part point, and the corresponding intersection point is obtained by the vertical line led by the equal part points of the inner and outer circumference of the top view. the intersection points are connected into two spiral lines by distinguishing the inner and outer circles, and the main view is completed.
- Ask for a long time and make an extension. It is not difficult to see from the main view and top view that the thin solid line edge of each triangle on the helicoid is a horizontal line, and its horizontal projection reflects the real length, and the real length of each line is equal; The dotted line and the arc of the inner and outer circles are straight lines and curves in general positions, and the projection does not reflect the real length, which can be calculated by the right triangle method (as shown in the drawing of the real long line). After finding the actual length of each line, he could use it to make the actual length of each triangle in turn to complete the expansion map.
2. ** Drawing the blade of the twisted dragon with Solid Works **
- First, select a reference surface and then click on the sketch. Then, click on the circle (R) to set the diameter to 50mm. Then, click on the spiral line under the feature selection curve command (set the pitch and the number of turns). Then, click on the sketch command to select the 3D sketch. Then, click on the convert entity reference. Finally, according to the above steps, draw a circle of 80mm directly. Again, click on the spiral line under the feature selection curve command, then click on the sketch command to select the 3D sketch, and click on the convert entity reference.
- After completing the above operations, click the metal plate command, select lofting and bending, the manufacturing method is forming, select the spiral line drawn just now in the outline bar, set the thickness to 2mm, and finally click OK, such a metal plate twisted dragon blade is completed.
3. ** The characteristics and production requirements of the twisted dragon blade **
- It is made of high-quality imported high-strength wear-resistant steel. The tooth distance deviation is less than 5mm and the surface of the leaves is smooth to ensure the uniform and stable transportation of materials, thus ensuring the repeated accuracy of material measurement.
- When the continuous spiral winding blade was made, the surface of the blade was cold-rolled with strain hardening. The hardness and wear resistance of the blade were about double that of ordinary leaves, and the hardness of the outer edge could reach nb240.
- The front and back section of the spiral screw dragon blades have two kinds of tooth pitch, sparse and dense, effectively preventing pipe blockage.

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