The difference between drawing a line and drawing a line, what is the difference between drawing a l

Now it's you who draw a line or two lines, and a line is a line that is drawn under something that already exists.

Drawing a line is wrong is usage, and the correct usage is to draw a line.

Scribing [huàxiàn].

Interpretation: refers to the operation of accurately drawing the processing boundary on the surface of the workpiece according to the size of the drawing or the physical object.

Scribing is an important process in machining, which is widely used in single parts or small batch production. In foundry enterprises, the first piece of the new mold can be marked and tested, which can find the problems in the size and shape of the casting in time, and take measures to avoid the loss caused by batch failure.

According to the drawings and technical requirements, the operation process of drawing the processing boundary with the marking tool on the blank or semi-finished product, or drawing the point and line as the datum is called the marking line.

Able to find and deal with unqualified blanks in time; When the blank error is not large, the method of borrowing material marking can be used to remedy, so as to improve the pass rate of the blank. According to the drawings and technical requirements, the operation process of drawing the processing boundary with the marking tool on the blank or semi-finished product, or drawing the point and line as the reference is called the marking line.

There are two types of marking: planar and three-dimensional. Only one surface of the workpiece needs to be marked to clearly indicate the processing boundary, which is called plane marking; It is necessary to draw lines on the surface of several workpieces at different angles (generally perpendicular to each other) in order to clearly indicate the late limit of the processing base, which is called three-dimensional marking of the workpiece. The basic requirements for marking are that the lines are clear and symmetrical, and the shaping and positioning dimensions are accurate.

The Dash tool is categorized by purpose.

1. Datum tools, including scribing plates, square boxes, V-shaped iron, and triangle iron.

Bending plates (right-angled plates) and various indexing heads, etc.

2. Measuring tools, including steel plate rulers, height measuring rulers, and vernier calipers.

Universal angle rulers, rectangular rulers, and steel tape measures to measure long dimensions, etc.

3. Drawing tools, including scribing needles, scribing discs, height vernier rulers, scribing rules, scribing cards, flat rulers, curve boards, hand hammers, sample punches, etc.

4. Auxiliary tools, including horns and jacks.

C-shaped chucks and clamps, as well as wooden strips and lead strips that are driven into the workpiece hole when centering and rounding.

Line drawing is a type of sketching, which uses monochrome lines to outline objects, characterized by conciseness and clarity, and creates shapes and textures according to the lightness, length, thickness and other brushstrokes of the line.

Line drawing, which uses the change of lines to depict the object and its shape and structure, is the oldest and most primitive painting method, and it is also one of the traditional Chinese painting methods.

Line drawing takes on different artistic effects depending on the tools used. The line can be monochrome or multi-colored, and other color lines can also be added between the line and the line or on the top of the line, resulting in a rich color change.

Basic Line Drawing Techniques:

1. Observe the object, outline the main line, add details such as the texture of the stove road, and draw lines of different shades according to the light and shade to highlight the three-dimensional authenticity. Commonly used tools are pencils, charcoal, charcoal strips, fountain pens, nylon pens, signature pens, markers, etc. Only by observing more can there be more painting language.

2. The lines that outline the outline when painting include curves, straight lines, broken lines, thick lines, and thin lines, which are collectively referred to as lines. Lines in geometric concepts have lengths, directions, and positions, and have no width, while lines, which are visible in design and visual elements, not only have length, direction, and position in the same way as lines in geometric concepts, but also have certain widths, dynamics, and emotional concepts.

Scribing: Noun, such as"Upline""Underline.

Draw a line: A verb that draws a line at a certain position in a sentence (somewhere).

Commonly used marking tools include marking plate, marking needle disk, marking gauge, center punch (sample punch), rectangular ruler, vernier height ruler, V-shaped iron, etc.

Marking tools are mainly used in the marking process in machining, and are widely used in single parts or small batch production.

The function of scribing: determine the machining position of the workpiece and the machining allowance. Check whether the shape and size of the blank conform to the drawing. Remedies when the blank is defective by scribing "borrowing". It is used for blanking.

1) When marking the line, the lines should be clear, even, and the numbers should be accurate, and all kinds of lines and symbols should be complete and accurate, and the deviation of each line pattern should be <.

2) The scribing deviation requires that the difference between the maximum diameter and the minimum diameter on the same section of the cylindrical part of the pressure element should not be greater than its nominal inner diameter; The straightness of the pot shell in each meter length should not be greater than, and the straightness of the full length should not be greater than 7mm;

The total length deviation of the pot shell is in the range of 15mm. According to the above requirements, the two diagonal line deviations and perimeter line deviations of the material calculated according to the diameter of the cylinder section are determined.