How to feed a small rectangle and a big mouth?

The problem of rectangular blanking with big upper mouth and small lower mouth needs our accurate calculation and cutting.

1. Size calculation:

First, we need to determine the height (h) and width (w) of the rectangle. For a rectangle with a large upper opening and a small lower opening, the height (h) should be equal to the upper opening diameter (D 1) minus the lower opening diameter (D2), and the width (w) should be equal to the upper opening diameter (D 1) minus twice the lower opening diameter (D2).

2. Preparation for cutting:

After getting the exact dimensions, we can prepare cutting tools according to these dimensions, such as saws and knives. At the same time, in order to ensure the accuracy of cutting, we can draw the lines to be cut on the plate or bar.

3. Cutting:

After the preparatory work is finished, we can start cutting. First, according to the calculated height (h) and width (w), the bar or plate is cut from one end. When cutting, make sure that the incision is straight and avoid tilting or bending.

Step 4 organize:

After cutting, we need to trim the cutting surface. You can use tools such as sandpaper or file to smooth the cutting surface to avoid burrs or unevenness.

5. Complete blanking:

After size calculation, blanking preparation, cutting and trimming, we finished the rectangular blanking work with large upper opening and small lower opening. The obtained rod or plate can be used for further processing or use.

It should be noted that in rectangular blanking with large upper opening and small lower opening, accurate size calculation and blanking are the key. If the size is inaccurate or cut improperly, the workpiece may not meet the requirements or even be unusable. Therefore, we must be careful in blanking to ensure that every step is accurate. In addition, for some special materials or shapes, it may be necessary to adopt special cutting methods or processes.

Therefore, it is necessary to choose suitable tools and methods according to the actual situation to ensure the cutting quality and efficiency. In a word, the rectangular blanking with big upper mouth and small lower mouth needs us to carefully take every step and link to ensure accurate size and smooth cutting. Only in this way can we get qualified workpieces and ensure their quality and performance.