1. Check the glue bit: check whether the glue bit is even, and if uneven, it will cause shrinkage and affect the appearance.

2. Determine the parting surface and the drawing Angle: the parting surface chooses the maximum value of the projection in the opening direction, and simplify it as much as possible.

3. Drawing principle:

(1) degumming direction drawing die.

(2) the largest end of the shaft is the product size, and the smallest end of the hole is the product size.

4. 2D mirror image: 2D must pay attention to mirror image and shrink, if you forget this step, most of the die dies.

5, shrinkage, shrinkage of small products can be put according to the experience (below 5 ‰), shrinkage products, for example, can put a 18) can also be put 20 ‰ more even may put 22 per product, must solicit opinions from the head put first, in order to avoid to form a complete set of product size does not fit.

6. Eccentricity KO should be coaxial.

7. Line points:

(1) the inclined guide column is usually used for power, and the smaller core distance is used in the t-groove, which is larger than 30mm oil cylinder.

(2) the Angle of the slope guide is 2 to 3 degrees smaller than the Angle of the shovel.

(3) the rear die position is more than half of the total height, but it can save the shovel and use the former die to make the face.

(4) the line width is greater than 100mm, and use 2 oblique guide posts as far as possible, with more than 150mm in the middle of the guide groove.

(5) position positioning: try not to use the bouncing ball (not strong enough), and use screw positioning.

(6) if the line is at TOP, be sure to put the spring. Otherwise, the position of the line can be driven by the force of gravity.

(7) in the open mode projection, if there is an inclined top or thimble under the row position, the first reset mechanism should be set. Otherwise, there may be interference between the position and the inclined top or thimble.

(8) walking, walking, walking beer, gluing bits, straight out.

(9) the trip should be more than 2 to 3mm, and the cylinder stroke should be more than 10mm.

(10) in order to increase the fastness of the shovel, try to do the backhoe.

8. Design points of oblique top:

(1) the inclined top 3-8 °, do you usually do no more than 15 °.

(2) the top out stroke is generally more than 0.5-1mm.

(3) tip: the glue level should be flat or upward, otherwise it will be delayed. Compare the width of the slanting top, add a frame to the thimble, reduce the slanting height to ensure the strength.