For any sheet metal, it has a processing process must, […]
For any sheet metal, it has a processing process must, also is the process that is not the same as the fabrication layout, process can also vary, with our situation, usually by the following procedure: customer orders to prepare drawings, making open graph (NC programming), blanking, bending, punching, universal pressure riveting and welding.
Introduction of mechanical drawing: sheet metal processing engineering drawing is also attributed to the field of mechanical drawing. Mechanical drawing is a discipline that accurately represents the layout, shape, scale, operation principle and skill requirement of a machine. Drawing is made up of figures, symbols, characters and numbers. It is a skill document expressing the purpose of planning, making demands and exchanging experience. It is often called engineering speech.
In the specification of mechanical drawing, the rules of the rules are: the drawing cap surface and the pattern, the share, the font and the drawing line. In the drawings and pattern rules of the corresponding scale frame drawing specification and the size of the drawings in the format. The share refers to the drawing of the scale length of the pattern and the practical scale of the machine and the enlargement of the share. In China, the rule man must be written in the length of the song body, and the letters and numbers are arranged according to the rules of the rules. There are eight kinds of specifications for the production line rules, such as the visible contour line, dotted line, solid line for making invisible contours for fine lines, making axis and the center line of symmetry for the production line and scale section line fine line etc..
Main parts of mechanical drawing and assembly drawing, part drawing parts of the shape, size and expression of production and inspection of parts of the skill requirement; assembly drawing assembly and operation principle of the relationship between the expression of parts and components of the mechanical parts; the expression of layout shapes, common view, cutaway view and profile etc..
A view is a figure based on the orthographic projection, that is, the projection of the part to the projection. According to the direction of the projection and the orientation of the corresponding projection plane, the view is divided into the main view, the overlook view and the left view. The view is used to express the external shape of the machine. The unseen contour in the figure is represented by a dotted line. When the parts are projected to the projection surface, there are two relative positions between the investigators, the machine parts and the projection surfaces between the three. When the plane is located between the projection surface and the survey, it is called the top projection method. The projection plane is located between the machine and the investigator, which is called the triangle projection method. The two projection methods can all express the shape of the machine parts in the same way.