In the processing of sheet metal parts, it is one of the basic skills necessary for every technician to read sheet metal drawings. Whether it is the production drawings in the early stage or the processing of the drawings in the later stage, it is one of the important factors that affect the processing of sheet metal parts in the later stage.
Many young people who have just joined the sheet metal industry are facing awkwardness in the face of sheet metal parts drawings. First of all, to understand its construction principle. The so-called sheet metal part processing three views means that in a projection system composed of three mutually perpendicular projection planes, the object is projected onto the projection surface, and the projection on the front side is called the main view, and the projection on the horizontal plane is called the top view. The projection on the side is called the left view, the main view reflects the height and length of the object; the top view reflects the length and width of the object; the left view reflects the height and width of the object.
How do you see three views of sheet metal parts processing drawings?
First of all, we must master the principle of "long alignment, high level, and width", that is, the method of looking at the view of the combination is the inverse of the drawing.
Drawing is to express a space object in a plane with a set of views. The view is based on a set of views of the object on the plane, by analyzing and figuring out the spatial shape of the object. So looking at the picture and drawing, the two are closely related and complementary.
Method 1: Body Analysis
The basics of the picture should be given priority: the combination chart has a third-order law, and it is necessary to contact several views while imagining the actual object. The method and steps of looking at the picture: When looking at the picture by the shape analysis method, the steps of the picture drawing are: understanding the feature grasping the feature; analyzing the shape to the projection; integrating the whole to think about the whole.
Method 2: Line Surface Analysis
For objects with well-defined shapes (such as superimposed shapes), the problem of viewing pictures can be solved by simply using the shape analysis method. When the local shape of an object and an object is relatively complicated (such as a cutting body), it is not convenient to divide it into several components by the shape analysis method, and the line surface analysis method can be used to view the image.
The main point of the line-line analysis method: the key point of the line-by-line analysis method is to analyze the spatial meaning of each wireframe and each line segment in the view. For a more complex shape, the surface shape should also be analyzed. For example, an object with a bevel (straight face) has a projection that accumulates into a line, and other projections become similar. For a combination of more layers, the wire frame can be used to analyze the mutual position of each surface, and the positional relationship between front and back, up and down, left and right, etc. can be clarified. This comprehensive application of various analytical methods leads to the complete concept of the combination.
The above is a description of how to look at the three views of the sheet metal parts processing drawings.
